Description of gcr

gcr		Programmers Guide
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Category:itl,algorithms

Component type:function

Prototype

template < class Matrix, class Vector, class VectorB, class Preconditioner, class Iteration > int gcr(const Matrix& A, Vector& x, const VectorB& b, const Preconditioner& M, int m, Iteration& outer) ;

Description

This solve the linear system Ax = b with restarted Preconditioned Generalized Conjugate Residual Algorithm.

A return value of 0 indicates convergence within the maximum number of iterations (determined by the iter object). A return value of 1 indicates a failure to converge.

See: Y. Saad, Iterative Methods for Sparse Linear System, PWS Publishing Company, 1996

Definition

gcr.h

Preconditions

Complexity

Example

Notes

See also