PCFieldSplitSetIS#
Sets the exact elements for a split in a PCFIELDSPLIT
Synopsis#
#include "petscpc.h"
PetscErrorCode PCFieldSplitSetIS(PC pc, const char splitname[], IS is)
Logically Collective
Input Parameters#
pc - the preconditioner context
splitname - name of this split, if
NULLthe number of the split is usedis - the index set that defines the elements in this split
Notes#
Use PCFieldSplitSetFields(), for splits defined by strided IS based on the matrix block size or the is_rows[] passed into MATNEST
This function is called once per split (it creates a new split each time). Solve options for this split will be available under the prefix -fieldsplit_SPLITNAME_.
See Also#
Solving Block Matrices with PCFIELDSPLIT, PC, PCFieldSplitGetSubKSP(), PCFIELDSPLIT, PCFieldSplitSetBlockSize(), PCFieldSplitSetFields()
Level#
intermediate
Location#
Examples#
src/snes/tutorials/ex70.c
src/ksp/ksp/tutorials/ex84.c
src/ksp/ksp/tutorials/ex81.c
src/snes/tutorials/ex28.c
Implementations#
PCFieldSplitSetIS_FieldSplit() in src/ksp/pc/impls/fieldsplit/fieldsplit.c
PCFieldSplitSetIS_Redistribute() in src/ksp/pc/impls/redistribute/redistribute.c
Index of all PC routines
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Index of all manual pages