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 on PC

Input Parameter#

pc

the preconditioner context

Output Parameter#

flg

PETSC_TRUE to use the Amat, PETSC_FALSE to use the Pmat (default is false)

Notes#

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#

PCSetUseAmat(), PCBJACOBI, PGMG, PCFIELDSPLIT, PCCOMPOSITE

Level#

intermediate

Location#

src/ksp/pc/interface/precon.c


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