:orphan:
# MatPtAPMultEqual
Compares matrix-vector products of C = Bt*A*B 
## Synopsis
```
#include "petscmat.h"  
PetscErrorCode MatPtAPMultEqual(Mat A, Mat B, Mat C, PetscInt n, PetscBool *flg)
```
Collective


## Input Parameters

- ***A -*** the first matrix
- ***B -*** the second matrix
- ***C -*** the third 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`, `MatMatMultAddEqual()`, `MatMultEqual()`, `MatMultAddEqual()`, `MatMultTransposeEqual()`

## Level
intermediate

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


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


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