# DMShellSetCreateRestriction
Set the routine used to create the restriction operator 
## Synopsis
```
#include "petscdmshell.h"  
PetscErrorCode DMShellSetCreateRestriction(DM dm, PetscErrorCode (*restriction)(DM, DM, Mat *))
```
Logically Collective on dm

Input Parameters

- ***dm -*** the shell DM
- ***striction-*** the routine to create the restriction





## See Also
 `DMShellSetCreateInjection()`, `DMCreateInterpolation()`, `DMShellGetCreateRestriction()`, `DMShellSetContext()`, `DMShellGetContext()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/shell/dmshell.c.html#DMShellSetCreateRestriction">src/dm/impls/shell/dmshell.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex65.c.html">src/ksp/ksp/tutorials/ex65.c.html</A><BR>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/dm/impls/shell/dmshell.c)


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