PETSc version 3.16.6
SNESFASSetRestriction
Sets the function to be used to restrict the defect from level l to l-1.
Synopsis
#include "petscsnes.h"
PetscErrorCode SNESFASSetRestriction(SNES snes, PetscInt level, Mat mat)
Input Parameters
| snes | - the multigrid context
|
| mat | - the restriction matrix
|
| level | - the level (0 is coarsest) to supply [Do not supply 0]
|
Notes
Usually this is the same matrix used also to set the interpolation
for the same level.
One can pass in the interpolation matrix or its transpose; PETSc figures
out from the matrix size which one it is.
If you do not set this, the transpose of the Mat set with SNESFASSetInterpolation()
is used.
See Also
SNESFASSetInterpolation(), SNESFASSetInjection()
Level
advanced
Location
src/snes/impls/fas/fasfunc.c
Index of all SNESFAS routines
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Index of all manual pages