petsc-dev 2014-07-12
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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