MatResidual#
Default routine to calculate the residual r = b - Ax
Synopsis#
#include "petscmat.h"
PetscErrorCode MatResidual(Mat mat, Vec b, Vec x, Vec r)
Collective
Input Parameters#
mat - the matrix
b - the right-hand-side
x - the approximate solution
Output Parameter#
r - location to store the residual
See Also#
Matrices, Mat, MatMult(), MatMultAdd(), PCMGSetResidual()
Level#
developer
Location#
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages