PCComputeOperator#
Computes the explicit preconditioned operator as a matrix Mat
.
Synopsis#
#include "petscksp.h"
PetscErrorCode PCComputeOperator(PC pc, MatType mattype, Mat *mat)
Collective
Input Parameters#
Output Parameter#
mat - the explicit preconditioned operator
Note#
This computation is done by applying the operators to columns of the identity matrix.
This routine is costly in general, and is recommended for use only with relatively small systems.
Currently, this routine uses a dense matrix format when mattype
== NULL
Developer Note#
This should be called PCCreateExplicitOperator()
See Also#
KSP: Linear System Solvers, PC
, KSPComputeOperator()
, MatType
Level#
advanced
Location#
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages