# PetscDualSpaceGetInteriorDimension
Get the interior dimension of the dual space, i.e. the number of basis functionals assigned to the interior of the reference domain 
## Synopsis
```
#include "petscfe.h" 
PetscErrorCode PetscDualSpaceGetInteriorDimension(PetscDualSpace sp, PetscInt *intdim)
```
Not collective


## Input Parameter

- ***sp -*** The `PetscDualSpace`



## Output Parameter

- ***dim -*** The dimension





## See Also
 `PetscDualSpace`, `PetscDualSpaceGetFunctional()`, `PetscDualSpaceCreate()`

## Level
intermediate

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


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/dm/dt/dualspace/interface/dualspace.c)


[Index of all DUALSPACE routines](index.md)  
[Table of Contents for all manual pages](/docs/manualpages/index.md)  
[Index of all manual pages](/docs/manualpages/singleindex.md)  
