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Index

A
A New Hope: Han Solo, Star Wars: A New Hope, C3PO, Star Wars: A New Hope, Han Solo, Star Wars: A New Hope, C3PO, Star Wars: A New Hope, Wedge Antilles, Star Wars: A New Hope, Obi-Wan Kenobi, Star Wars: A New Hope, Obi-Wan Kenobi, Star Wars: A New Hope
    A-stability and A(α)-stability: Definition 11.4.2
      Adams–Bashforth formula: Paragraph
        Adams–Moulton formula: Paragraph
          Airy equation: Exercise 10.4.5
            Allen–Cahn equation: Exercise 10.1.5, Exercise 10.2.3, Example 10.5.4, Exercise 11.5.4, Example 13.4.4
              Arnoldi iteration: Definition 8.4.2, (8.6.2), Arnoldi iteration
                absolute stability: Definition 11.3.1, absolute stability
                  accuracy (relative vs. absolute): Paragraph
                    adaptivity:adjacency matrix: Definition 7.1.1, Paragraph, adjacency matrix
                      adjoint: adjoint
                        adjoint of a matrix: Paragraph, Paragraph
                          advection equation: Definition 12.1.1, Example 12.2.1, advection equation
                            advection-diffusion equation: Paragraph, Paragraph, Example 13.2.3, Example 13.4.3
                              algebraic convergence: algebraic convergence
                                algorithm: Paragraph, algorithm
                                  aliasing: Exercise 9.5.2
                                    argmin: Definition 3.1.1
                                      asymptotic: asymptotic
                                        asymptotic notation: Definition 2.5.1
                                          B
                                          Bauer–Fike theorem: Paragraph
                                            Bessel equation: Exercise 10.1.1, Exercise 10.4.4
                                              Bessel function: Example 4.1.1
                                                Black–Scholes equation: Paragraph
                                                  Broyden update: Paragraph
                                                    Burgers equation: Exercise 12.1.3
                                                      backward difference: Definition 5.4.2
                                                        backward differentiation formula for IVPs: Paragraph
                                                          backward error: Definition 1.4.1, Observation 4.1.1, Paragraph, backward errorbackward substitution: Paragraph, backward substitution
                                                            banded matrix: Paragraph, Note
                                                              bandwidth: bandwidth
                                                                bandwidth of a matrix: Definition 2.9.2
                                                                  barycentric interpolation formula: Theorem 9.2.1, barycentric interpolation formula
                                                                    barycentric weights: Definition 9.2.1
                                                                      beam equation: Exercise 12.4.6
                                                                        big-O: big-O
                                                                          boundary conditions:boundary-value problem: boundary-value problem
                                                                            C
                                                                            C3PO: C3PO, Star Wars: A New Hope, C3PO, Star Wars: A New Hope
                                                                              CFL condition: Theorem 12.2.1
                                                                                Carrier equation: Exercise 10.1.1, Exercise 10.5.7
                                                                                  Chebyshev equation: Exercise 10.1.2
                                                                                    Chebyshev points:Chebyshev polynomials: Definition 9.4.5
                                                                                      Cholesky factorization: Theorem 2.9.3, Cholesky factorization
                                                                                        Clenshaw–Curtis integration: Paragraph
                                                                                          Crank–Nicolson method: Exercise 11.2.3
                                                                                            cardinal function: Definition 5.1.2, Paragraph, Paragraph, Paragraph, cardinal function
                                                                                              centered difference: Definition 5.4.2
                                                                                                characteristic polynomial: Paragraph
                                                                                                  collocation: Paragraph, collocation
                                                                                                    condition number: condition numberconjugate gradients: Definition 8.6.1
                                                                                                      conservation law: Paragraph
                                                                                                        contraction mapping: Paragraph
                                                                                                          convergence rate:cubic spline: Definition 5.3.1, cubic spline
                                                                                                            D
                                                                                                            D'Alembert's solution: Exercise 12.4.3
                                                                                                              Dahlquist theorems: Theorem 6.8.2, Theorem 6.8.3, Theorem 11.4.1
                                                                                                                Dirichlet boundary condition: Definition 10.1.2, Paragraph
                                                                                                                  Dirichlet boundary conditions: Paragraph
                                                                                                                    Dirichlet condition: Dirichlet condition
                                                                                                                      data fitting: Paragraphderivative:diagonal matrix: Definition A.1, Definition 7.2.3, Definition 7.3.1
                                                                                                                        diagonalizable matrix: Definition 7.2.3, diagonalizable matrix
                                                                                                                          differentiation matrix: Definition 10.3.1, Definition 10.3.2, Definition 10.3.3, Definition 10.3.4, Paragraph, Paragraph, differentiation matrix
                                                                                                                            diffusion equation: See heat equation
                                                                                                                              dimension reduction: Paragraph, Paragraph
                                                                                                                                divide and conquer: Section 5.7.2
                                                                                                                                  domain of dependence: Definition 12.2.1, domain of dependence
                                                                                                                                    dominant eigenvalue: dominant eigenvalue
                                                                                                                                      double exponential transformation: Paragraph
                                                                                                                                        double precision: double precision
                                                                                                                                          E
                                                                                                                                          Euler's method: Paragraph, Paragraph
                                                                                                                                            Euler–Maclaurin formula: Paragraph
                                                                                                                                              Euler’s method: Euler’s method
                                                                                                                                                eigenvalue: Definition 7.2.1, Comment, eigenvalueeigenvalue decomposition: Definition 7.2.3, Paragraph, Paragraph, eigenvalue decomposition
                                                                                                                                                  eigenvector: Definition 7.2.1, eigenvector
                                                                                                                                                    elliptic PDE: Paragraph
                                                                                                                                                      evolutionary PDE: Paragraph, evolutionary PDE
                                                                                                                                                        extrapolation: Paragraph, extrapolation
                                                                                                                                                          F
                                                                                                                                                          FFT (fast Fourier transform): Paragraph
                                                                                                                                                            Fisher equation: Exercise 11.5.5
                                                                                                                                                              Francis QR iteration: Paragraph
                                                                                                                                                                Frobenius norm: Frobenius norm
                                                                                                                                                                  field of values: Exercise 7.4.4
                                                                                                                                                                    fill-in of sparse matrices: Paragraph
                                                                                                                                                                      finite differences: Definition 5.4.1, Paragraph, Paragraphfinite element method: Paragraph
                                                                                                                                                                        finite element method (FEM): finite element method (FEM)
                                                                                                                                                                          finite-difference formula: finite-difference formulafixed-point iteration: Definition 4.2.2, fixed-point iteration
                                                                                                                                                                            fixed-point problem: Definition 4.2.1, fixed-point problem
                                                                                                                                                                              floating-point numbers: Definition 1.1.1, Paragraph, floating-point numbers
                                                                                                                                                                                flop: flop
                                                                                                                                                                                  flops: Paragraph
                                                                                                                                                                                    forward difference: Definition 5.4.2
                                                                                                                                                                                      forward substitution: Paragraph, forward substitution
                                                                                                                                                                                        G
                                                                                                                                                                                        GMRES: Algorithm 8.5.1, GMRESGalerkin conditions: (10.6.10), Galerkin conditions
                                                                                                                                                                                          Gaussian elimination: Paragraph, Gaussian elimination
                                                                                                                                                                                            Gaussian integration: Paragraph
                                                                                                                                                                                              Gauss–Newton method: Definition 4.7.2, Gauss–Newton method
                                                                                                                                                                                                Gibbs phenomenon: Exercise 9.5.5
                                                                                                                                                                                                  Gram matrix: Definition 9.4.2
                                                                                                                                                                                                    Gregory integration formula: Exercise 5.6.2
                                                                                                                                                                                                      generating polynomials: Paragraph, generating polynomials
                                                                                                                                                                                                        global error: Definition 6.2.4, global error
                                                                                                                                                                                                          graph: Definition 7.1.1, graph
                                                                                                                                                                                                            H
                                                                                                                                                                                                            HPD matrix: HPD matrix
                                                                                                                                                                                                              Han Solo: Han Solo, Star Wars: A New Hope, Han Solo, The Empire Strikes Back, Han Solo, Star Wars: A New Hope, Han Solo, The Empire Strikes Back
                                                                                                                                                                                                                Helmholtz equation: Exercise 8.1.6, Exercise 8.6.6
                                                                                                                                                                                                                  Hermite equation: Exercise 10.1.2
                                                                                                                                                                                                                    Horner's algorithm: Example 1.3.1
                                                                                                                                                                                                                      Householder reflector: Definition 3.4.1
                                                                                                                                                                                                                        hat functions: Paragraph, hat functions
                                                                                                                                                                                                                          heat equation: Definition 11.1.2, Paragraph, Example 13.2.2, heat equation
                                                                                                                                                                                                                            hermitian: hermitian
                                                                                                                                                                                                                              hermitian matrix: Paragraph, Paragraph, Theorem 7.3.2, hermitian matrix
                                                                                                                                                                                                                                hermitian positive definite matrix: See symmetric positive definite matrix
                                                                                                                                                                                                                                  homogeneous boundary condition: Definition 10.1.2, Paragraph, homogeneous boundary condition
                                                                                                                                                                                                                                    hyperbolic PDE: Definition 12.1.1
                                                                                                                                                                                                                                      I
                                                                                                                                                                                                                                      IEEE 754: Paragraph, Exercise 1.1.4
                                                                                                                                                                                                                                        identity matrix: Definition 2.2.3, Paragraph, identity matrix
                                                                                                                                                                                                                                          ill-conditioned: ill-conditioned
                                                                                                                                                                                                                                            image (as a matrix): Paragraph, Example 7.5.1, Paragraph
                                                                                                                                                                                                                                              implicit: implicit
                                                                                                                                                                                                                                                implicit IVP solver: Definition 6.6.1, Paragraph
                                                                                                                                                                                                                                                  improper integral: Exercise 5.7.3, Paragraph
                                                                                                                                                                                                                                                    induced matrix norm: induced matrix norm
                                                                                                                                                                                                                                                      initial-boundary-value problem: Paragraph
                                                                                                                                                                                                                                                        initial-value problem: Definition 6.1.1, initial-value probleminner product: Paragraph, inner productinner product space: Definition 9.4.1
                                                                                                                                                                                                                                                          interpolation: Definition 5.1.1, Paragraph, interpolationinverse iteration: Definition 8.3.1, inverse iteration
                                                                                                                                                                                                                                                            invertible matrix: Paragraph
                                                                                                                                                                                                                                                              J
                                                                                                                                                                                                                                                              Jacobian matrix: Definition 4.5.2, Paragraph, Paragraph, Jacobian matrix
                                                                                                                                                                                                                                                                Julia:
                                                                                                                                                                                                                                                                K
                                                                                                                                                                                                                                                                Kronecker product: Definition 13.3.2, Kronecker product
                                                                                                                                                                                                                                                                  Krylov matrix: Definition 8.4.1
                                                                                                                                                                                                                                                                    Krylov subspace: Definition 8.4.1, Krylov subspace
                                                                                                                                                                                                                                                                      Kuramoto–Sivashinsky equation: Exercise 12.1.4
                                                                                                                                                                                                                                                                        L
                                                                                                                                                                                                                                                                        LU factorization: Definition 2.4.2, Paragraph, Paragraph, LU factorizationLagrange formula: Lagrange formula
                                                                                                                                                                                                                                                                          Lagrange interpolation formula: Theorem 9.1.2
                                                                                                                                                                                                                                                                            Lagrange polynomial: Definition 9.1.1
                                                                                                                                                                                                                                                                              Laguerre equation: Exercise 10.1.2
                                                                                                                                                                                                                                                                                Lanczos iteration: (8.6.2), Lanczos iteration
                                                                                                                                                                                                                                                                                  Laplace equation: Definition 13.3.1, Laplace equation
                                                                                                                                                                                                                                                                                    Legendre equation: Exercise 10.1.2
                                                                                                                                                                                                                                                                                      Legendre polynomials: Definition 9.4.4
                                                                                                                                                                                                                                                                                        Levenberg's method: Algorithm 4.6.2
                                                                                                                                                                                                                                                                                          Lipschitz condition: Definition 4.2.4
                                                                                                                                                                                                                                                                                            Luke Skywalker: Luke Skywalker, Return of the Jedi
                                                                                                                                                                                                                                                                                              linear combination: Paragraph
                                                                                                                                                                                                                                                                                                linear convergence: Definition 4.2.3, linear convergence
                                                                                                                                                                                                                                                                                                  linear least-squares problem: Definition 3.1.1, Paragraph, Paragraph, linear least-squares problem
                                                                                                                                                                                                                                                                                                    linearization of an ODE: Definition 11.4.1
                                                                                                                                                                                                                                                                                                      local truncation error: local truncation error
                                                                                                                                                                                                                                                                                                        logistic equation: (6.1.3), Exercise 6.1.5
                                                                                                                                                                                                                                                                                                          M
                                                                                                                                                                                                                                                                                                          MATLAB:MINRES: Paragraph
                                                                                                                                                                                                                                                                                                            Maxwell's equations: Paragraph
                                                                                                                                                                                                                                                                                                              machine epsilon: Definition 1.1.2, Paragraph, Paragraph, machine epsilonmantissa: See significand
                                                                                                                                                                                                                                                                                                                mass matrix: Paragraph
                                                                                                                                                                                                                                                                                                                  matrix condition number: matrix condition number
                                                                                                                                                                                                                                                                                                                    matrix factorization: Theorem 7.3.2matrix inverse: Paragraph, Paragraph
                                                                                                                                                                                                                                                                                                                      matrix multiplication: Paragraph
                                                                                                                                                                                                                                                                                                                        method of lines: Paragraph, Paragraph, Paragraph, Paragraph, method of lines
                                                                                                                                                                                                                                                                                                                          multistep: multistep
                                                                                                                                                                                                                                                                                                                            multistep method: Definition 6.6.1, Paragraph
                                                                                                                                                                                                                                                                                                                            N
                                                                                                                                                                                                                                                                                                                            NaN: Paragraph
                                                                                                                                                                                                                                                                                                                              Neumann boundary condition: Definition 10.1.2, Paragraph
                                                                                                                                                                                                                                                                                                                                Neumann condition: Neumann condition
                                                                                                                                                                                                                                                                                                                                  Newton's method: Definition 4.3.1, Paragraph, ParagraphNewton’s method: Newton’s method
                                                                                                                                                                                                                                                                                                                                    nodes: nodes
                                                                                                                                                                                                                                                                                                                                      nonlinear least squares: Definition 4.7.1
                                                                                                                                                                                                                                                                                                                                        nonlinear least-squares problem: nonlinear least-squares problem
                                                                                                                                                                                                                                                                                                                                          norm: normnormal equations: Theorem 3.2.1, Theorem 3.2.2, Paragraph, normal equations
                                                                                                                                                                                                                                                                                                                                            normal matrix: Definition 7.2.5, normal matrix
                                                                                                                                                                                                                                                                                                                                              numerical domain of dependence: Paragraph
                                                                                                                                                                                                                                                                                                                                                numerical integration: Paragraph, Paragraph
                                                                                                                                                                                                                                                                                                                                                  numerical integration formula: numerical integration formula
                                                                                                                                                                                                                                                                                                                                                    O
                                                                                                                                                                                                                                                                                                                                                    ONC matrix: Definition 3.3.2, Paragraph, ONC matrix
                                                                                                                                                                                                                                                                                                                                                      Obi-Wan Kenobi: Obi-Wan Kenobi, Star Wars: A New Hope, Obi-Wan Kenobi, Star Wars: A New Hope
                                                                                                                                                                                                                                                                                                                                                        Oregonator: Example 11.4.1
                                                                                                                                                                                                                                                                                                                                                          one-step IVP method: one-step IVP method
                                                                                                                                                                                                                                                                                                                                                            order of accuracy: Paragraph, order of accuracyorthogonal functions: Definition 9.4.1
                                                                                                                                                                                                                                                                                                                                                              orthogonal matrix: Paragraph, Paragraph, Definition 3.4.1, Definition 7.2.2, orthogonal matrix
                                                                                                                                                                                                                                                                                                                                                                orthogonal polynomials: Paragraph, orthogonal polynomials
                                                                                                                                                                                                                                                                                                                                                                  orthogonal vectors: Paragraph, orthogonal vectors
                                                                                                                                                                                                                                                                                                                                                                    orthonormal vectors: Paragraph, orthonormal vectors
                                                                                                                                                                                                                                                                                                                                                                      outer product: Paragraph, Paragraph, Paragraph, outer product
                                                                                                                                                                                                                                                                                                                                                                        overdetermined: overdetermined
                                                                                                                                                                                                                                                                                                                                                                          P
                                                                                                                                                                                                                                                                                                                                                                          PLU factorization: Definition 2.6.2, PLU factorization
                                                                                                                                                                                                                                                                                                                                                                            Poisson equation: Definition 13.3.1, Poisson equation
                                                                                                                                                                                                                                                                                                                                                                              Python:parabolic PDE: Definition 11.1.2
                                                                                                                                                                                                                                                                                                                                                                                parameter continuation: Paragraph
                                                                                                                                                                                                                                                                                                                                                                                  pendulum: Exercise 10.2.2
                                                                                                                                                                                                                                                                                                                                                                                    piecewise linear: piecewise linear
                                                                                                                                                                                                                                                                                                                                                                                      piecewise linear interpolant: Paragraph
                                                                                                                                                                                                                                                                                                                                                                                        pivoting: Paragraph, Paragraph, Theorem 2.9.3
                                                                                                                                                                                                                                                                                                                                                                                          power iteration: Definition 8.2.2, power iteration
                                                                                                                                                                                                                                                                                                                                                                                            preconditioner: preconditioner
                                                                                                                                                                                                                                                                                                                                                                                              preconditioning: Definition 8.8.1
                                                                                                                                                                                                                                                                                                                                                                                                predator–prey model: Paragraph
                                                                                                                                                                                                                                                                                                                                                                                                  pseudoinverse: Definition 3.2.2, pseudoinverse
                                                                                                                                                                                                                                                                                                                                                                                                    Q
                                                                                                                                                                                                                                                                                                                                                                                                    QR factorization: QR factorization
                                                                                                                                                                                                                                                                                                                                                                                                      quadratic convergence: Definition 4.3.2, quadratic convergence
                                                                                                                                                                                                                                                                                                                                                                                                        quadrature: See numerical integration
                                                                                                                                                                                                                                                                                                                                                                                                          quasi-Newton method: Paragraph
                                                                                                                                                                                                                                                                                                                                                                                                            quasi-Newton methods: quasi-Newton methods
                                                                                                                                                                                                                                                                                                                                                                                                              quasimatrix: Definition 9.4.2, quasimatrix
                                                                                                                                                                                                                                                                                                                                                                                                                R
                                                                                                                                                                                                                                                                                                                                                                                                                Rayleigh quotient: Paragraph, Rayleigh quotient
                                                                                                                                                                                                                                                                                                                                                                                                                  Return of the Jedi: Luke Skywalker, Return of the Jedi
                                                                                                                                                                                                                                                                                                                                                                                                                    Robin boundary condition: Definition 10.1.2
                                                                                                                                                                                                                                                                                                                                                                                                                      Runge phenomenon: Section 9.3.1, Paragraph, Runge phenomenon
                                                                                                                                                                                                                                                                                                                                                                                                                        Runge–Kutta: Runge–Kutta
                                                                                                                                                                                                                                                                                                                                                                                                                          Runge–Kutta method: Paragraph, Paragraph, Paragraph
                                                                                                                                                                                                                                                                                                                                                                                                                            reduced QR factorization: reduced QR factorization
                                                                                                                                                                                                                                                                                                                                                                                                                              reduced SVD: reduced SVD
                                                                                                                                                                                                                                                                                                                                                                                                                                residual: Paragraph, Paragraph, Paragraph, Paragraph, Paragraph, residualrestarting: restarting
                                                                                                                                                                                                                                                                                                                                                                                                                                  rootfinding problem: Definition 4.1.1, Paragraph, (11.5.6), rootfinding problemroots:row pivoting: row pivoting
                                                                                                                                                                                                                                                                                                                                                                                                                                    S
                                                                                                                                                                                                                                                                                                                                                                                                                                    SPD matrix: SPD matrix See symmetric positive definite matrix
                                                                                                                                                                                                                                                                                                                                                                                                                                      SVD: See singular value decomposition
                                                                                                                                                                                                                                                                                                                                                                                                                                        Simpson's formula: Paragraph, Paragraph
                                                                                                                                                                                                                                                                                                                                                                                                                                          Sylvester equation: Paragraph
                                                                                                                                                                                                                                                                                                                                                                                                                                            secant method: Definition 4.4.1, secant method
                                                                                                                                                                                                                                                                                                                                                                                                                                              semidiscretization:shifted inverse iteration: See inverse iteration
                                                                                                                                                                                                                                                                                                                                                                                                                                                shock wave: Paragraph
                                                                                                                                                                                                                                                                                                                                                                                                                                                  shooting: shooting
                                                                                                                                                                                                                                                                                                                                                                                                                                                    significand: Paragraph
                                                                                                                                                                                                                                                                                                                                                                                                                                                      significant digits: Paragraph
                                                                                                                                                                                                                                                                                                                                                                                                                                                        similar matrices: similar matrices
                                                                                                                                                                                                                                                                                                                                                                                                                                                          similarity transformation: Paragraph, similarity transformation
                                                                                                                                                                                                                                                                                                                                                                                                                                                            simple root: simple root
                                                                                                                                                                                                                                                                                                                                                                                                                                                              sine integral function: Exercise 5.7.5
                                                                                                                                                                                                                                                                                                                                                                                                                                                                sine–Gordon equation: Exercise 12.4.5
                                                                                                                                                                                                                                                                                                                                                                                                                                                                  singular matrix: Paragraph
                                                                                                                                                                                                                                                                                                                                                                                                                                                                    singular value decomposition: Definition 7.3.1, Paragraph, singular value decompositionsoap film: Exercise 13.4.2
                                                                                                                                                                                                                                                                                                                                                                                                                                                                      sparse matrix: Paragraph, Paragraph, Paragraph, Paragraph, Note, sparse matrix
                                                                                                                                                                                                                                                                                                                                                                                                                                                                        spectral convergence: spectral convergence
                                                                                                                                                                                                                                                                                                                                                                                                                                                                          spline (cubic spline): Definition 5.3.1
                                                                                                                                                                                                                                                                                                                                                                                                                                                                            stability: Paragraph, Paragraphstability region: Definition 11.3.2, stability region
                                                                                                                                                                                                                                                                                                                                                                                                                                                                              steepest descent: Paragraph
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                step size: step size
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  stiff differential equation: Paragraph, Paragraph, Example 6.7.2, stiff differential equation
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    stiffness matrix: Paragraph
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      subtractive cancellation: Paragraph, Paragraph, Paragraph, Paragraph, Paragraph, subtractive cancellation
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        superlinear convergence: Paragraph, superlinear convergence
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          symmetric matrix: Paragraph, Paragraph, Paragraph, Paragraph, symmetric matrix
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            symmetric positive definite matrix: Definition 2.9.3, Paragraph, Definition 8.6.1
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              T
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              The Empire Strikes Back: Yoda, The Empire Strikes Back, Han Solo, The Empire Strikes Back, Yoda, The Empire Strikes Back, Yoda, The Empire Strikes Back, Han Solo, The Empire Strikes Back
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                tensor-product domain: Definition 13.1.1, tensor-product domain
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  tensor-product grid: Section 13.1.1
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    thin QR: thin QR
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      thin SVD: thin SVD
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        transpose: Paragraph, Paragraph
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          trapezoid formula: trapezoid formulatriangular matrix: Definition A.1, Paragraph, triangular matrix
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            tridiagonal matrix: Definition 2.9.2, tridiagonal matrix
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              trigonometric polynomial: Definition 9.5.1, trigonometric polynomial
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                truncation error: truncation error
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                U
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                unit lower triangular matrix: Paragraph
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  unit roundoff: Definition 1.1.2
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    unit triangular matrix: unit triangular matrix
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      unit vector: Definition 2.7.2, unit vector
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        unitary matrix: Definition 7.2.2, Definition 7.2.5, Definition 7.3.1, Theorem 7.4.2, unitary matrix
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          unstable: unstable
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            unvec: Paragraph
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              upper Hessenberg matrix: Definition 8.4.3, upper Hessenberg matrix
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                upwind: upwind
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  upwind direction: Definition 12.2.3
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    V
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    Vandermonde matrix: Definition 2.1.2, Paragraph, Vandermonde matrix
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      van der Pol equation: Exercise 11.4.5
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        vec: Paragraph
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          W
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Wedge Antilles: Wedge Antilles, Star Wars: A New Hope
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            wave equation: Definition 12.4.1, Paragraph, wave equation
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              weak solution: Definition 10.6.1
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                weights: weights
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Y
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Yoda: Yoda, The Empire Strikes Back, Yoda, The Empire Strikes Back, Yoda, The Empire Strikes Back
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    Z
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    zero-stability: Definition 6.8.1
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      zero-stable: zero-stable