hexed::iterative Namespace Reference

iterative solvers for linear equations, in particular Krylov subspace methods More...

Functions
void	gmres (Linear_equation &equation, int n_restart, int n_iters)
	solves a linear equation approximately with GMRES
void	bicgstab (Linear_equation &equation, int n_iters)
	solves a linear equation approximately with BiCGStab

Detailed Description

iterative solvers for linear equations, in particular Krylov subspace methods

Function Documentation

bicgstab()

void hexed::iterative::bicgstab	(	Linear_equation &	equation,
		int	n_iters )

solves a linear equation approximately with BiCGStab

Runs n_iters iterations. Requires the Linear_equation object to storage for at least 8 vectors.

gmres()

void hexed::iterative::gmres	(	Linear_equation &	equation,
		int	n_restart,
		int	n_iters )

solves a linear equation approximately with GMRES

GMRES is restarted every n_restart iterations. A total of n_iters restarts are performed, requiring approximately n_restart*n_iters matrix-vector products. Requires the Linear_equation object to have storage for at least n_restart + 3 vectors.