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# MatMumpsGetNullPivots
Get MUMPS parameter PIVNUL_LIST() 
## Synopsis
```
#include "petscmat.h"  
PetscErrorCode MatMumpsGetNullPivots(Mat F, PetscInt *size, PetscInt **array)
```
Logically Collective


## Input Parameter

- ***F -*** the factored matrix obtained by calling `MatGetFactor()` from PETSc-MUMPS interface



## Output Parameters

- ***size -*** local size of the array. The size of the array is non-zero only on the host.
- ***array -*** array of rows with null pivot, these rows follow 0-based indexing. The array gets allocated within the function and the user is responsible
for freeing this array.





## References

- **** -*** MUMPS Users' Guide



## See Also
 [](ch_matrices), `Mat`, `MatGetFactor()`, `MatMumpsSetIcntl()`, `MatMumpsGetIcntl()`, `MatMumpsSetCntl()`, `MatMumpsGetCntl()`, `MatMumpsGetInfo()`, `MatMumpsGetInfog()`, `MatMumpsGetRinfo()`

## Level
beginner

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/aij/mpi/mumps/mumps.c.html#MatMumpsGetNullPivots">src/mat/impls/aij/mpi/mumps/mumps.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex52.c.html">src/ksp/ksp/tutorials/ex52.c</A><BR>

## Implementations

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/aij/mpi/mumps/mumps.c.html#MatMumpsGetNullPivots_MUMPS">MatMumpsGetNullPivots_MUMPS in src/mat/impls/aij/mpi/mumps/mumps.c</A><BR>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/mat/impls/aij/mpi/mumps/mumps.c)


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