PCMGSetResidual#

Sets the function to be used to calculate the residual on the lth level.

Synopsis#

#include "petscksp.h" 
PetscErrorCode PCMGSetResidual(PC pc, PetscInt l, PetscErrorCode (*residual)(Mat, Vec, Vec, Vec), Mat mat)

Logically Collective

Input Parameters#

  • pc - the multigrid context

  • l - the level (0 is coarsest) to supply

  • residual - function used to form residual, if none is provided the previously provide one is used, if no previous one were provided then a default is used

  • mat - matrix associated with residual

See Also#

KSP: Linear System Solvers, PCMG, PCMGResidualDefault()

Level#

advanced

Location#

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


Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages