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# MATBLOCKMAT
A matrix that is defined by a set of `Mat`'s that represents a sparse block matrix consisting of (usually) sparse blocks. 


## See Also
 [](ch_matrices), `Mat`, `MatCreateBlockMat()`

## Level
advanced

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


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


[Index of all Mat routines](index.md)  
[Table of Contents for all manual pages](/manualpages/index.md)  
[Index of all manual pages](/manualpages/singleindex.md)