petsc-master 2016-09-28
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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, PetscInt fields[], IS *is, DM *subdm)
Not collective

Input Parameters

dm - the DM object
numFields - number of fields in this subproblem
len - The number of subproblems in the decomposition (or NULL if not requested)

Output Parameters

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

See Also

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

Level:intermediate
Location:
src/dm/interface/dm.c
Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages

Examples

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