[petsc-dev] misleading that ROSW uses SNES

[Matthew Knepley]

On Tue, Oct 16, 2012 at 3:24 PM, Barry Smith <bsmith at mcs.anl.gov> wrote:

>
>    It is seriously misleading that TSType rosw uses SNES as the solver
> since it is only using SNESKSP and the algorithm really is built around
> only linear solves.  Are you sure that using SNES is the right model for
> this family of algorithms? Convince me.
>
>    I realize one person among us thinks we should use SNES for both linear
> and nonlinear solves, but he is wrong :-)


Let me try a Venn Diagram:
 _________________________________
/                                _____________   \
|                               /                        \  |
|  Nonlinear problems | Linear problems |  |
|                               \ _____________/  |
\_________________________________/

Also, there is no overhead using SNES, so I would say Do Not Multiply
Entities Beyond The Necessary.

  Matt

   Matt


>
>   Barry
>
>


-- 
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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