Matrix addition

[Matthew Knepley]

We do have MatAXPY() modeled after BLAS.

   Matt

On 12/28/06, Tobias Neckel <neckel at in.tum.de> wrote:
> Hi,
>
> I have a small (perhaps even silly) question concerning an addition of two matrices.
> Sorry in advance since I am quite new in using petsc.
>
> Currently I am successfully using MatPtAP for the computation of a matrix Q = M^T*A*M
> with matrices M and A in my C++ code.
> Now, I need to enlarge the functionality to use two matrices M1 and M2 together with
> A in order to calculate Q = M1^T*A*M1 + M2^T*A*M2.
>
> I have been looking in the manual pages for a routine for adding up two matrices
> without success. Is there any way to do this and I just didn't see it? Or is there
> another possibility in order to compute my desired matrix Q?
>
> Thank you
> Tobias
>
>


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