PCGetUseAmat#
Gets a flag to indicate that when the preconditioner needs to apply (part of) the operator during the preconditioning process it applies the Amat provided to TSSetRHSJacobian(), TSSetIJacobian(), SNESSetJacobian(), KSPSetOperators() or PCSetOperators() not the Pmat.
Synopsis#
#include "petscksp.h"
PetscErrorCode PCGetUseAmat(PC pc, PetscBool *flg)
Logically Collective
Input Parameter#
pc - the preconditioner context
Output Parameter#
flg -
PETSC_TRUEto use the Amat,PETSC_FALSEto use the Pmat (default is false)
Note#
For the common case in which the linear system matrix and the matrix used to construct the preconditioner are identical, this routine is does nothing.
See Also#
PC, PCSetUseAmat(), PCBJACOBI, PGMG, PCFIELDSPLIT, PCCOMPOSITE
Level#
intermediate
Location#
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages