petsc-3.13.6 2020-09-29
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SNESFASSetLevels

Sets the number of levels to use with FAS. Must be called before any other FAS routine.

Synopsis

#include "petscsnes.h"  
PetscErrorCode SNESFASSetLevels(SNES snes, PetscInt levels, MPI_Comm *comms)

Input Parameters

snes - the snes context
levels - the number of levels
comms - optional communicators for each level; this is to allow solving the coarser problems on smaller sets of processors.

Notes

If the number of levels is one then the multigrid uses the -fas_levels prefix for setting the level options rather than the -fas_coarse prefix.

See Also

SNESFASGetLevels()

Level

intermediate

Location

src/snes/impls/fas/fasfunc.c
Index of all SNESFAS routines
Table of Contents for all manual pages
Index of all manual pages