petsc-3.10.5 2019-03-28
PCComputeExplicitOperator
Computes the explicit preconditioned operator.
Synopsis
#include "petscksp.h"
PetscErrorCode PCComputeExplicitOperator(PC pc,Mat *mat)
Collective on PC
Input Parameter
pc -the preconditioner object
Output Parameter
mat -the explict preconditioned operator
Notes
This computation is done by applying the operators to columns of the
identity matrix.
Currently, this routine uses a dense matrix format when 1 processor
is used and a sparse format otherwise. This routine is costly in general,
and is recommended for use only with relatively small systems.
Keywords
PC, compute, explicit, operator
See Also
KSPComputeExplicitOperator()
Level
advanced
Location
src/ksp/pc/interface/precon.c
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages