[petsc-users] question about MatMatMultTranspose

[Jed Brown]

On Thu, Apr 5, 2012 at 04:43, Gao Bin <bin.gao at uit.no> wrote:

> I would like to use PETSc perform matrix-matrix multiplication C=A*B^T. I
> notice that MatMatMultTranspose could calculate C=A^T*B, but which is not I
> want.
>
> Does anyone know how to perform C=A*B^T using PETSc (I know I could first
> calculate B^T and call MatMatMult with A and B^T, but it might not be
> efficient, is it?)? Thank you in advance.
>

Use petsc-dev. That routine is renamed (
http://www.mcs.anl.gov/petsc/petsc-dev/docs/manualpages/Mat/MatTransposeMatMult.html)
and the one you want is

http://www.mcs.anl.gov/petsc/petsc-dev/docs/manualpages/Mat/MatMatTransposeMult.html
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