[petsc-users] snes_type aspin without DA example

[Barry Smith]

  A test would be great.

> On Jun 22, 2023, at 3:20 PM, Karin&NiKo <niko.karin at gmail.com> wrote:
> 
> Thank you Barry. I will try this.
> Should I provide a test in src/binding/petsc4py/test/test_snes.py ?
> 
> Le jeu. 22 juin 2023 à 20:41, Barry Smith <bsmith at petsc.dev <mailto:bsmith at petsc.dev>> a écrit :
>> 
>>   You are not missing anything. The petsc4py stub for SNESNASMSetSubdomains() has not been written. You could add it by adding to
>> src/petsc4py/PETSc/SNES.pyx and src/petsc4py/PETSc/petscsnes.pxi and then make a merge request  https://petsc.org/release/developers/contributing/ to get it into PETSc.
>> 
>>> On Jun 22, 2023, at 1:54 PM, Karin&NiKo <niko.karin at gmail.com <mailto:niko.karin at gmail.com>> wrote:
>>> 
>>> Dear PETSc team,
>>> 
>>> I would like to play with aspin-type nonlinear solvers. I have found several tests like snes/tutorials/ex19.c but they all use DA, which I don't want to use since I need to stick at the algebraic level.
>>> Then, I started looking at petsc4py/demo/ode/heat.py and tried to set up things.
>>> Unfortunately, I get the error "DM has no default decomposition defined.  Set subsolves manually with SNESNASMSetSubdomains()" which, I think, I do understand.
>>> But I do not find any implementation of the SNESNASMSetSubdomains in petsc4py. 
>>> Am I missing something ? 
>>> Thanks,
>>> Nicolas
>> 

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