PCFieldSplitSetOffDiagUseAmat

set flag indicating whether to extract off-diagonal blocks from Amat (rather than Pmat) to build the sub-matrices associated with each split. Where KSPSetOperators(ksp,Amat,Pmat) was used to supply the operators.

Synopsis

#include "petscpc.h" 
PetscErrorCode PCFieldSplitSetOffDiagUseAmat(PC pc, PetscBool flg)

Logically Collective

Input Parameters

• pc - the preconditioner object

• flg - boolean flag indicating whether or not to use Amat to extract the off-diagonal blocks from

Options Database Key

• -pc_fieldsplit_off_diag_use_amat - use the Amat to extract the off-diagonal blocks

See Also

Solving Block Matrices with PCFIELDSPLIT, PC, PCSetOperators(), KSPSetOperators(), PCFieldSplitGetOffDiagUseAmat(), PCFieldSplitSetDiagUseAmat(), PCFIELDSPLIT

Level

intermediate

Location

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

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Index of all PC routines
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