[petsc-dev] status of MatBlock vs MatNest?

[Jed Brown]

MatBlockMat is serial-only and supports few operations. I don't know anyone
who uses it. It would be useful to know if anyone uses it.

MatNest currently has "dense" storage, though some slots can be missing.
Each block can, and usually is, a parallel matrix.


On Wed, Nov 14, 2012 at 10:29 PM, Barry Smith <bsmith at mcs.anl.gov> wrote:

>
>    Is MatBlock needed now that MatNest exists?  Is MatBlock different
> enough that it is needed in addition to MatNest?
>
>    MatBlock seems to support sparse matrices each entry of which is a
> sparse matrix with many rows and columns of blocks, is MatNest restricted
> to a smaller number of blocks?
>
>    Is MatBlock working and tested?
>
>    Thanks
>
>     Barry
>
>
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