# MatProductSetAlgorithm
Requests a particular algorithm for a matrix product computation that will perform to compute the given matrix 
## Synopsis
```
#include "petscmat.h" 
PetscErrorCode MatProductSetAlgorithm(Mat mat, MatProductAlgorithm alg)
```
Collective on mat


## Input Parameters

- ***mat -*** the matrix product
- ***alg -*** particular implementation algorithm of the matrix product, e.g., `MATPRODUCTALGORITHMDEFAULT`.



## Options Database Key

- ***-mat_product_algorithm <algorithm> -*** Sets the algorithm; use -help for a list
of available algorithms (for instance, scalable, outerproduct, etc.)





## See Also
 `MatProductSetType()`, `MatProductSetFill()`, `MatProductCreate()`, `MatProductAlgorithm`, `MatProductType`

## Level
intermediate

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