[petsc-users] Requesting help with SNES non-linear example

[Jose E. Roman]

The examples in those old slides might be outdated. Try with the examples that come with the PETSc repo or tarball. In particular, that example can be found in src/binding/petsc4py/demo/legacy/bratu2d/bratu2d.py.

Jose

> El 25 oct 2024, a las 19:58, Vaishak Prasad <vaishakprasad at gmail.com> escribió:
> 
> Dear All,
> Greetings from India.
> 
> I am new to petsc4py. I was trying out the example on slides 18, and 19 at
> 
> https://urldefense.us/v3/__https://www.bu.edu/pasi/files/2011/01/Lisandro-Dalcin-petsc4py.pdf__;!!G_uCfscf7eWS!dpUYbX5YRxvaN33h0mhRCxEMkia_yIdGU6sQOpV0upkfReAJkPC8H6GX4HH6NNvgOCt1F2Ogn2963Ff_Vkub5yK7$ 
> 
> However, I get a zero vector for the solution `x`.
> 
> I am using petsc4py 3.21.3 on Linux.
> 
> Any help would be appreciated.
> 
> With regards
> 
> -- 
> Vaishak Prasad
> Post Doctoral Fellow
> Astrophysical Relativity Group
> International Center for Theoretical Sciences
> Tata Institute of Fundamental Research
> Survey No. 151, Shivakote, Hesaraghatta Hobli,
> Bengaluru, Karnataka, India, 
> Earth, Solar system, 
> Milky Way Galaxy, The Local Group