petsc-3.5.2 2014-09-08
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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