petsc-3.9.2 2018-05-20
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DMCreateSubDM

Returns an IS and DM encapsulating a subproblem defined by the fields passed in. The fields are defined by DMCreateFieldIS().

Synopsis

#include "petscdm.h"          
#include "petscdmlabel.h"     
#include "petscds.h"     
PetscErrorCode DMCreateSubDM(DM dm, PetscInt numFields, const PetscInt fields[], IS *is, DM *subdm)
Not collective

Input Parameters

dm - The DM object
numFields - The number of fields in this subproblem
fields - The field numbers of the selected fields

Output Parameters

is - The global indices for the subproblem
subdm - The DM for the subproblem

See Also

DMDestroy(), DMView(), DMCreateInterpolation(), DMCreateColoring(), DMCreateMatrix(), DMCreateFieldIS()

Level

intermediate

Location

src/dm/interface/dm.c

Examples

src/snes/examples/tutorials/ex56.c.html
src/snes/examples/tutorials/ex77.c.html

Implementations

DMCreateSubDM_DA in src/dm/impls/da/dacreate.c
DMCreateSubDM_Forest in src/dm/impls/forest/forest.c
DMCreateSubDM_Patch in src/dm/impls/patch/patch.c
DMCreateSubDM_Plex in src/dm/impls/plex/plex.c
DMCreateSubDM_Shell in src/dm/impls/shell/dmshell.c

Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages