petsc-master 2019-05-25
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PCComputeOperator

Computes the explicit preconditioned operator.

Synopsis

#include "petscksp.h" 
PetscErrorCode  PCComputeOperator(PC pc,MatType mattype,Mat *mat)
Collective on PC

Input Parameter

pc - the preconditioner object
mattype - the matrix type to be used for the operator

Output Parameter

mat -the explict preconditioned operator

Notes

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

Keywords

PC, compute, explicit, operator

See Also

KSPComputeOperator(), MatType

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