[petsc-users] MatPtAP for involving MPIDENSE and MPIAIJ matrices

Matthew Knepley knepley at gmail.com
Thu Oct 15 08:40:55 CDT 2015

On Thu, Oct 15, 2015 at 8:20 AM, Bikash Kanungo <bikash at umich.edu> wrote:

> HI,
> I'm trying to evaluate B = P^T * A * P, where P is an MPIDENSE matrix and
> A is an MPIAIJ matrix. Neither MatTransposeMatMult nor MatPtAP support such
> an operation for the given type of matrices. I tried to look into
> MATELEMENTAL class and didn't find any MatTransposeMatMult function for a
> pair of Elemental matrices.
> What would be a possible and efficient way to perform such the above
> operation?

Jed, is TAIJ the way to do this?


> Thanks,
> Bikash
> --
> Bikash S. Kanungo
> PhD Student
> Computational Materials Physics Group
> Mechanical Engineering
> University of Michigan

What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener
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