:orphan:
# MatProductSymbolic
Perform the symbolic portion of a matrix-matrix product operation, this creates a data structure for use with the numerical product to be done with `MatProductNumeric()` 
## Synopsis
```
#include "petscmat.h" 
PetscErrorCode MatProductSymbolic(Mat mat)
```
Collective


## Input/Output Parameter

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





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


## See Also
 [](ch_matrices), `MatProduct`, `Mat`, `MatProductCreate()`, `MatProductCreateWithMat()`, `MatProductSetFromOptions()`, `MatProductNumeric()`, `MatProductSetType()`, `MatProductSetAlgorithm()`

## Level
intermediate

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

## Examples
<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#MatProductSymbolic_MPIAIJKokkos">MatProductSymbolic_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#MatProductSymbolic_MPIAIJBACKEND">MatProductSymbolic_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#MatProductSymbolic_H2OPUS">MatProductSymbolic_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#MatProductSymbolic_Htool">MatProductSymbolic_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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