:orphan:
# DMCreateSectionSubDM
Returns an `IS` and subDM+subSection encapsulating a subproblem defined by the fields in a `PetscSection` in the `DM`. 
## Synopsis
```
#include "petscdm.h"     
PetscErrorCode DMCreateSectionSubDM(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, which must already have be cloned from `dm`





## Note
This handles all information in the `DM` class and the `PetscSection`. This is used as the basis for creating subDMs in specialized classes,
such as `DMPLEX` and `DMFOREST`


## See Also
`DMCreateSubDM()`, `DMGetLocalSection()`, `DMPlexSetMigrationSF()`, `DMView()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/interface/dmi.c.html#DMCreateSectionSubDM">src/dm/interface/dmi.c</A>


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