petsc-3.7.1 2016-05-15
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(), KSPSetOperator() or PCSetOperator() not the Pmat.
Synopsis
#include "petscksp.h"
PetscErrorCode PCGetUseAmat(PC pc,PetscBool *flg)
Logically Collective on PC Many br
Input Parameter
pc -the preconditioner context Many br
Output Parameter
flg -PETSC_TRUE to use the Amat, PETSC_FALSE to use the Pmat (default is false) Many br
Notes
For the common case in which the linear system matrix and the matrix used to construct the Many brpreconditioner are identical, this routine is does nothing. Many br
Many br
See Also
PCSetUseAmat(), PCBJACOBI, PGMG, PCFIELDSPLIT, PCCOMPOSITE
Level:intermediate
Location:src/ksp/pc/interface/precon.c
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages