# MatIsHermitianTranspose
Test whether a matrix is another one's Hermitian transpose, 
## Synopsis
```
#include "petscmat.h" 
PetscErrorCode MatIsHermitianTranspose(Mat A, Mat B, PetscReal tol, PetscBool *flg)
```
Collective on A


## Input Parameters

- ***A -*** the matrix to test
- ***B -*** the matrix to test against, this can equal the first parameter



## Output Parameters

- ***flg -*** the result



## Notes
Only available for `MATAIJ` matrices.

The sequential algorithm
has a running time of the order of the number of nonzeros; the parallel
test involves parallel copies of the block-offdiagonal parts of the matrix.




## See Also
 `MatTranspose()`, `MatIsSymmetric()`, `MatIsHermitian()`, `MatIsTranspose()`

## Level
intermediate

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

## Implementations

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/aij/seq/aij.c.html#MatIsHermitianTranspose_SeqAIJ">MatIsHermitianTranspose_SeqAIJ in src/mat/impls/aij/seq/aij.c</A><BR>


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