[petsc-dev] [petsc-users] MatGetSubMatrices or VecCreateGhost

[Barry Smith]

  Hong,

   Another customer for a parallel dense matmatmult


> On Oct 16, 2015, at 11:42 AM, 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.

   We don't have a parallel 
>  If the
> number of vectors was much smaller than their size (e.g., 10), then
> alternatives might make sense.