:orphan:
# MatDenseRestoreSubMatrix
Returns access to a block of columns of a dense matrix obtained from MatDenseGetSubMatrix(). 
## Synopsis
```
#include "petscmat.h" 
PetscErrorCode MatDenseRestoreSubMatrix(Mat A, Mat *v)
```
Collective


## Input Parameters

- ***mat -*** the `Mat` object
- ***v -*** the `Mat` object (may be `NULL`)





## See Also
 [](ch_matrices), `Mat`, `MATDENSE`, `MATDENSECUDA`, `MATDENSEHIP`, `MatDenseGetColumnVec()`, `MatDenseRestoreColumnVec()`, `MatDenseGetSubMatrix()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/dense/seq/dense.c.html#MatDenseRestoreSubMatrix">src/mat/impls/dense/seq/dense.c</A>

## Implementations

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/dense/mpi/mpidense.c.html#MatDenseRestoreSubMatrix_MPIDense">MatDenseRestoreSubMatrix_MPIDense in src/mat/impls/dense/mpi/mpidense.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/dense/seq/dense.c.html#MatDenseRestoreSubMatrix_SeqDense">MatDenseRestoreSubMatrix_SeqDense in src/mat/impls/dense/seq/dense.c</A><BR>


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


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