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/ex45.c
src/ksp/ksp/tutorials/ex32.c
src/ksp/ksp/tutorials/ex70.c
src/ksp/ksp/tutorials/ex73.c
src/ksp/ksp/tutorials/ex22f.F90
src/dm/impls/stag/tutorials/ex8.c
src/dm/impls/stag/tutorials/ex4.c
src/ksp/ksp/tutorials/ex45f.F90
src/ksp/ksp/tutorials/ex36.cxx
src/ksp/ksp/tutorials/ex29.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages