petsc-3.8.4 2018-03-24
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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 on PC

Input Parameters

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_PRE_USER
userpre - matrix to use for preconditioning (with PC_FIELDSPLIT_PRE_USER), or NULL

See Also

PCFieldSplitSetSchurPre(), PCFieldSplitGetSubKSP(), PCFIELDSPLIT, PCFieldSplitSetFields(), PCFieldSplitSchurPreType, PCLSC

Level:intermediate
Location:src/ksp/pc/impls/fieldsplit/fieldsplit.c
Index of all PC routines
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Index of all manual pages