KSPSetDM#
Sets the DM
that may be used by some preconditioners and that may be used to construct the linear system
Synopsis#
#include "petscksp.h"
PetscErrorCode KSPSetDM(KSP ksp, DM dm)
Logically Collective
Input Parameters#
Notes#
If this is used then the KSP
will attempt to use the DM
to create the matrix and use the routine set with
DMKSPSetComputeOperators()
. Use KSPSetDMActive
(ksp,PETSC_FALSE
) to instead use the matrix you’ve provided with
KSPSetOperators()
.
A DM
can only be used for solving one problem at a time because information about the problem is stored on the DM
,
even when not using interfaces like DMKSPSetComputeOperators()
. Use DMClone()
to get a distinct DM
when solving
different problems using the same function space.
See Also#
KSP: Linear System Solvers, KSP
, DM
, KSPGetDM()
, KSPSetDMActive()
, KSPSetComputeOperators()
, KSPSetComputeRHS()
, KSPSetComputeInitialGuess()
, DMKSPSetComputeOperators()
, DMKSPSetComputeRHS()
, DMKSPSetComputeInitialGuess()
Level#
intermediate
Location#
Examples#
src/ksp/ksp/tutorials/ex22f.F90
src/ksp/ksp/tutorials/ex32.c
src/ksp/ksp/tutorials/ex65.c
src/ksp/ksp/tutorials/ex34.c
src/dm/impls/stag/tutorials/ex8.c
src/ksp/ksp/tutorials/ex29.c
src/ksp/ksp/tutorials/ex70.c
src/ksp/ksp/tutorials/ex73.c
src/dm/impls/stag/tutorials/ex4.c
src/ksp/ksp/tutorials/ex25.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages