Boundary conditions in Chebyshev and Legendre methods
SIAM Journal on Numerical Analysis
Uniqueness of Gauss-Birkhoff quadrature formulas
SIAM Journal on Numerical Analysis
Finite-element preconditioning for pseudospectral solutions of elliptic problems
SIAM Journal on Scientific and Statistical Computing
The pseudospectral method for third-order differential equations
SIAM Journal on Numerical Analysis
Properties of collocation third-derivative operators
Journal of Computational Physics
SIAM Journal on Scientific Computing
Spectral methods in MatLab
Finite Element Method for Elliptic Problems
Finite Element Method for Elliptic Problems
Jacobi approximations in non-uniformly Jacobi-weighted Sobolev spaces
Journal of Approximation Theory
A Collocation Method with Exact Imposition of Mixed Boundary Conditions
Journal of Scientific Computing
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We derive in this paper the asymptotic estimates of the nodes and weights of the Gauss-Lobatto-Legendre-Birkhoff (GLLB) quadrature formula, and obtain optimal error estimates for the associated GLLB interpolation in Jacobi weighted Sobolev spaces. We also present a user-oriented implementation of the pseudospectral methods based on the GLLB quadrature nodes for Neumann problems. This approach allows an exact imposition of Neumann boundary conditions, and is as efficient as the pseudospectral methods based on Gauss-Lobatto quadrature for PDEs with Dirichlet boundary conditions.