[petsc-users] pc_gamg_threshol

[Jeremy Theler]

Yes, I read that page and it was that paragraph that made me want to
learn more.

For example, that pages says:

“-pc_gamg_threshold 0.0 is the most robust option (the reason for this
is not obvious) ...”


Where can I find more math-based background on this subject? I mean,
some text that describes the methods and not just the implementation as
the source code at gamg/util.c so I can better understand what is going
on.


Thanks



-- 
Jeremy Theler
www.seamplex.com



On Thu, 2017-01-05 at 09:18 -0500, Mark Adams wrote:
> You want the bottom of page 84 in the manual.
> 
> On Wed, Jan 4, 2017 at 4:33 PM, Barry Smith <bsmith at mcs.anl.gov>
> wrote:
>         
>            The manual page gives a high-level description
>         http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/PC/PCGAMGSetThreshold.html the exact details can be found in the code here http://www.mcs.anl.gov/petsc/petsc-dev/src/ksp/pc/impls/gamg/util.c.html#PCGAMGFilterGraph  I'm adding a link from the former to the later in the documentation.
>         
>            Barry
>         
>         
>         
>         > On Jan 4, 2017, at 3:16 PM, Jeremy Theler
>         <jeremy at seamplex.com> wrote:
>         >
>         > * Any reference to what pc_gamg_treshold means and/or does?
>         >
>         >
>         >
>         > On Wed, 2017-01-04 at 18:13 -0300, Jeremy Theler wrote:
>         >> Hi! Any reference to what does -pc_gamg_threshold mean
>         and/or?
>         >>
>         >
>         
>         
> 
>