PCFieldSplitSchurGetS#
extract the MATSCHURCOMPLEMENT object used by this PCFIELDSPLIT in case it needs to be configured separately
Synopsis#
#include "petscpc.h"
PetscErrorCode PCFieldSplitSchurGetS(PC pc, Mat *S)
Not Collective
Input Parameter#
pc - the preconditioner context
Output Parameter#
S - the Schur complement matrix
Note#
This matrix should not be destroyed using MatDestroy(); rather, use PCFieldSplitSchurRestoreS().
See Also#
Solving Block Matrices with PCFIELDSPLIT, PC, PCFieldSplitGetSubKSP(), PCFIELDSPLIT, PCFieldSplitSchurPreType, PCFieldSplitSetSchurPre(), MATSCHURCOMPLEMENT, PCFieldSplitSchurRestoreS(),
MatCreateSchurComplement(), MatSchurComplementGetKSP(), MatSchurComplementComputeExplicitOperator(), MatGetSchurComplement()
Level#
advanced
Location#
src/ksp/pc/impls/fieldsplit/fieldsplit.c
Index of all PC routines
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Index of all manual pages