:orphan:
# PetscDualSpaceGetDeRahm
Get the k-simplex associated with the functionals in this dual space 
## Synopsis
```
#include "petscfe.h" 
PetscErrorCode PetscDualSpaceGetDeRahm(PetscDualSpace dsp, PetscInt *k)
```

## Input Parameter

- ***dsp -*** The `PetscDualSpace`



## Output Parameter

- ***k   -*** The simplex dimension





## Note
Currently supported values are
```none
  0: These are H_1 methods that only transform coordinates
  1: These are Hcurl methods that transform functions using the covariant Piola transform (COVARIANT_PIOLA_TRANSFORM)
  2: These are the same as 1
  3: These are Hdiv methods that transform functions using the contravariant Piola transform (CONTRAVARIANT_PIOLA_TRANSFORM)
```



## See Also
 `PetscDualSpace`, `PetscDualSpacePullback()`, `PetscDualSpacePushforward()`, `PetscDualSpaceTransform()`, `PetscDualSpaceTransformType`

## Level
developer

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/dt/dualspace/interface/dualspace.c.html#PetscDualSpaceGetDeRahm">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](/manualpages/index.md)  
[Index of all manual pages](/manualpages/singleindex.md)