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# MatHtoolGetPermutationSource
Gets the permutation associated to the source cluster for a `MATHTOOL` matrix. 
## Synopsis
```
#include "petscmat.h" 
PETSC_EXTERN PetscErrorCode MatHtoolGetPermutationSource(Mat A, IS *is)
```

## Input Parameter

- ***A -*** hierarchical matrix



## Output Parameter

- ***is -*** permutation





## See Also
 [](ch_matrices), `Mat`, `MATHTOOL`, `MatHtoolGetPermutationTarget()`, `MatHtoolUsePermutation()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/htool/htool.cxx.html#MatHtoolGetPermutationSource">src/mat/impls/htool/htool.cxx</A>

## Implementations

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/htool/htool.cxx.html#MatHtoolGetPermutationSource_Htool">MatHtoolGetPermutationSource_Htool in src/mat/impls/htool/htool.cxx</A><BR>


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