# PetscDSGetWeakForm
Returns the weak form object 
## Synopsis
```
#include "petscds.h" 
PetscErrorCode PetscDSGetWeakForm(PetscDS ds, PetscWeakForm *wf)
```
Not collective


## Input Parameter

- ***ds -*** The `PetscDS` object



## Output Parameter

- ***wf -*** The weak form object





## See Also
 `PetscWeakForm`, `PetscDSSetWeakForm()`, `PetscDSGetNumFields()`, `PetscDSCreate()`

## Level
beginner

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/dt/interface/dtds.c.html#PetscDSGetWeakForm">src/dm/dt/interface/dtds.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/tutorials/ex17.c.html">src/snes/tutorials/ex17.c.html</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/tutorials/ex23.c.html">src/snes/tutorials/ex23.c.html</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex76.c.html">src/ts/tutorials/ex76.c.html</A><BR>


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