NAME

lis_solver_get_residualnorm - calculate the relative residual norm from the solution

SYNOPSIS

#include "lis.h"

LIS_INT lis_solver_get_residualnorm(LIS_SOLVER solver, LIS_INT *residual);

DESCRIPTION

Calculate the relative residual norm ||b - Ax||_2/||b||_2 from the solution x.

INPUT

solver

The solver

OUTPUT

residual

The relative residual norm ||b - Ax||_2/||b||_2

EXIT STATUS

The following exit values are returned:

0

The process is normally terminated

unspecified

An error occurred

SEE ALSO

lis(3)

http://www.ssisc.org/lis/