petsc-3.7.5 2017-01-01
PCFieldSplitSchurGetS
extract the MatSchurComplement object used by this PC 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
Notes
This matrix should not be destroyed using MatDestroy(); rather, use PCFieldSplitSchurRestoreS().
See Also
PCFieldSplitGetSubKSP(), PCFIELDSPLIT, PCFieldSplitSchurPreType, PCFieldSplitSetSchurPre(), MatSchurComplement, PCFieldSplitSchurRestoreS()
Level:advanced
Location:src/ksp/pc/impls/fieldsplit/fieldsplit.c
Index of all PC routines
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Index of all manual pages