PCMGMatResidualDefault#

Default routine to calculate the residual.

Synopsis#

#include "petscksp.h" 
PetscErrorCode PCMGMatResidualDefault(Mat mat, Mat b, Mat x, Mat 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#

PCMG, PCMGSetMatResidual(), PCMGResidualDefault()

Level#

developer

Location#

src/ksp/pc/impls/mg/mgfunc.c


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