If you want to make a PR with your hack, we can help build out the
infrastructure for what Jed is recommending.
Thanks,
Matt
On Fri, Aug 4, 2023 at 2:56 PM Jed Brown wrote:
> Yeah, we'd like the implementation to stay in alpha2.c. There could be a
> new interface
Yeah, we'd like the implementation to stay in alpha2.c. There could be a new
interface TSAlpha2SetPredictorType (with -ts_alpha2_predictor_type
[none,same_velocity,...]) or TSAlpha2SetPredictorFunction.
David Kamensky writes:
> Hi Jed,
>
> The current workaround I'm using is very minimal and
Hi Jed,
The current workaround I'm using is very minimal and basically just moves
the definition of `TS_Alpha` from `alpha2.c` up to `petsc/private/tsimpl.h`
(and renames it to avoid a conflict with `TS_Alpha` in `alpha1.c`), but I
gather that we're really still not "supposed to" include that
Some other TS implementations have a concept of extrapolation as an initial
guess. Such method-specific initial guesses sound like they fit that pattern
and would be welcome to be included in alpha2.c. Would you be willing to make a
merge request to bring your work upstream?
David Kamensky
Hi Jed,
What I'm trying to compute is basically a standard same-velocity or
same-acceleration predictor (although slightly more complicated, since I'm
restricting it to a sub-system). I hadn't looked into
`SNESSetComputeInitialGuess` yet, although one difficulty is that it would
need access to
I think you can use TSGetSNES() and SNESSetComputeInitialGuess() to modify the
initial guess for SNES. Would that serve your needs? Is there anything else you
can say about how you'd like to compute this initial guess? Is there a paper or
something?
David Kamensky writes:
> Hi,
>
> My
