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# MatMultEqual
Compares matrix-vector products of two matrices. 
## Synopsis
```
#include "petscmat.h"  
PetscErrorCode MatMultEqual(Mat A, Mat B, PetscInt n, PetscBool *flg)
```
Collective


## Input Parameters

- ***A -*** the first matrix
- ***B -*** the second matrix
- ***n -*** number of random vectors to be tested



## Output Parameter

- ***flg -*** `PETSC_TRUE` if the products are equal; `PETSC_FALSE` otherwise.





## See Also
 `Mat`, `MatMultAddEqual()`, `MatMultTransposeEqual()`, `MatMultTransposeAddEqual()`, `MatIsLinear()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/utils/multequal.c.html#MatMultEqual">src/mat/utils/multequal.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex81.c.html">src/ksp/ksp/tutorials/ex81.c</A><BR>


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