petsc-3.9.4 2018-09-11
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
Table of Contents for all manual pages
Index of all manual pages