petsc-3.7.3 2016-08-01

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MatResidual

Default routine to calculate the residual.

Synopsis

#include "petscmat.h" 
PetscErrorCode MatResidual(Mat mat,Vec b,Vec x,Vec r)

Collective on Mat and Vec

Input Parameters

	mat	- the matrix
	b	- the right-hand-side
	x	- the approximate solution

Output Parameter

r -location to store the residual

Keywords

MG, default, multigrid, residual

See Also

PCMGSetResidual()

Level:developer
Location:src/mat/interface/matrix.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages