:orphan:
# MatProductNumeric
Compute a matrix-matrix product operation with the numerical values 
## Synopsis
```
#include "petscmat.h" 
PetscErrorCode MatProductNumeric(Mat mat)
```
Collective


## Input/Output Parameter

- ***mat -*** the matrix whose values are computed via a matrix-matrix product operation





## Note
`MatProductSymbolic()` must have been called on `mat` before calling this function


## See Also
 [](ch_matrices), `MatProduct`, `Mat`, `MatProductSetAlgorithm()`, `MatProductSetType()`, `MatProductCreate()`, `MatSetType()`, `MatProductSymbolic()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/interface/matproduct.c.html#MatProductNumeric">src/mat/interface/matproduct.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/tao/pde_constrained/tutorials/elliptic.c.html">src/tao/pde_constrained/tutorials/elliptic.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/tao/pde_constrained/tutorials/parabolic.c.html">src/tao/pde_constrained/tutorials/parabolic.c</A><BR>

## Implementations

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/aij/mpi/kokkos/mpiaijkok.kokkos.cxx.html#MatProductNumeric_MPIAIJKokkos">MatProductNumeric_MPIAIJKokkos in src/mat/impls/aij/mpi/kokkos/mpiaijkok.kokkos.cxx</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/aij/mpi/mpiaij.c.html#MatProductNumeric_MPIAIJBACKEND">MatProductNumeric_MPIAIJBACKEND in src/mat/impls/aij/mpi/mpiaij.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/h2opus/cuda/math2opus.cu.html#MatProductNumeric_H2OPUS">MatProductNumeric_H2OPUS in src/mat/impls/h2opus/cuda/math2opus.cu</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/htool/htool.cxx.html#MatProductNumeric_Htool">MatProductNumeric_Htool in src/mat/impls/htool/htool.cxx</A><BR>


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


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