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# MATSBAIJ
MATSBAIJ = "sbaij" - A matrix type to be used for symmetric block sparse matrices. This matrix type is identical to `MATSEQSBAIJ` when constructed with a single process communicator,
and `MATMPISBAIJ` otherwise.


## Options Database Key

- ***-mat_type sbaij -*** sets the matrix type to `MATSBAIJ` during a call to `MatSetFromOptions()`





## See Also
 [](ch_matrices), `Mat`, `MATSEQSBAIJ`, `MATMPISBAIJ`, `MatCreateSBAIJ()`, `MATSEQSBAIJ`, `MATMPISBAIJ`

## Level
beginner

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/sbaij/mpi/mpisbaij.c.html#MATSBAIJ">src/mat/impls/sbaij/mpi/mpisbaij.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/tutorials/ex48.c.html">src/snes/tutorials/ex48.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex14.c.html">src/ts/tutorials/ex14.c</A><BR>


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


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