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# MATAIJMKL
MATAIJMKL = "AIJMKL" - A matrix type to be used for sparse matrices. This matrix type is identical to `MATSEQAIJMKL` when constructed with a single process communicator,
and `MATMPIAIJMKL` otherwise.  As a result, for single process communicators,
MatSeqAIJSetPreallocation() is supported, and similarly `MatMPIAIJSetPreallocation()` is supported
for communicators controlling multiple processes.  It is recommended that you call both of
the above preallocation routines for simplicity.


## Options Database Key

- ***-mat_type aijmkl -*** sets the matrix type to `MATAIJMKL` during a call to `MatSetFromOptions()`





## See Also
 [](ch_matrices), `Mat`, `MATMPIAIJMKL`, `MATSEQAIJMKL`, `MatCreateMPIAIJMKL()`, `MATSEQAIJMKL`, `MATMPIAIJMKL`, `MATSEQAIJSELL`, `MATMPIAIJSELL`, `MATSEQAIJPERM`, `MATMPIAIJPERM`

## Level
beginner

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/aij/mpi/aijmkl/mpiaijmkl.c.html#MATAIJMKL">src/mat/impls/aij/mpi/aijmkl/mpiaijmkl.c</A>


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


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