PCFieldSplitGetSchurPre

For Schur complement fieldsplit, determine how the Schur complement will be preconditioned. See PCFieldSplitSetSchurPre() for details.

Synopsis

#include "petscpc.h" 
PetscErrorCode PCFieldSplitGetSchurPre(PC pc, PCFieldSplitSchurPreType *ptype, Mat *pre)

Logically Collective

Input Parameter

• pc - the preconditioner context

Output Parameters

• ptype - which matrix to use for preconditioning the Schur complement: PC_FIELDSPLIT_SCHUR_PRE_A11, PC_FIELDSPLIT_SCHUR_PRE_SELF, PC_FIELDSPLIT_SCHUR_PRE_USER

• pre - matrix to use for preconditioning (with PC_FIELDSPLIT_SCHUR_PRE_USER), or NULL

See Also

Solving Block Matrices, PC, PCFieldSplitSetSchurPre(), PCFieldSplitGetSubKSP(), PCFIELDSPLIT, PCFieldSplitSetFields(), PCFieldSplitSchurPreType, PCLSC

Level

intermediate

Location

src/ksp/pc/impls/fieldsplit/fieldsplit.c

Implementations

PCFieldSplitGetSchurPre_FieldSplit() in src/ksp/pc/impls/fieldsplit/fieldsplit.c

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