petsc3.13.4 20200801
SNESFASSetInterpolation
Sets the function to be used to calculate the interpolation from l1 to the lth level
Synopsis
#include "petscsnes.h"
PetscErrorCode SNESFASSetInterpolation(SNES snes, PetscInt level, Mat mat)
Input Parameters
 snes   the multigrid context

 mat   the interpolation operator

 level   the level (0 is coarsest) to supply [do not supply 0]

Notes
Usually this is the same matrix used also to set the restriction
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.
See Also
SNESFASSetInjection(), SNESFASSetRestriction(), SNESFASSetRScale()
Level
advanced
Location
src/snes/impls/fas/fasfunc.c
Index of all SNESFAS routines
Table of Contents for all manual pages
Index of all manual pages