[petsc-users] MatGetSubMatrices or VecCreateGhost

[Bikash Kanungo]

Thanks for the input Jed.
On Oct 16, 2015 12:42 PM, "Jed Brown" <jed at jedbrown.org> wrote:

> Bikash Kanungo <bikash at umich.edu> writes:
> > Matrix A defined in my problem is of size NxN and I have N vectors v_i,
> > each of length N, which are to be multiplied by A. N is fairly small
> > 10000-50000.
>
> Your vectors form a square matrix, so I would use MatMatMult.  If the
> number of vectors was much smaller than their size (e.g., 10), then
> alternatives might make sense.
>
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