PETSc version 3.15.5
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 on PC
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
 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