v1.04.120 PETSC05 — Using user solver with petsc4py

Summary:

This test case allows you to validate the definition and use of a user solver with PETSc.

The solver is defined by the user in Python as a petsc4py object. PETSc. KSP and it’s then used in the MECA_STATIQUE or STAT_NON_LINE calculation operator…

In modeling A, the preconditioner is trivial. The test is purely computer based.

In modeling B, the preconditioner is an implementation of the Reverse Constrained Augmented Preconditioner developed by Franceschini*et al.* and published in `https://doi.org/10.48550/arXiv.2111.05599`_ < https://doi.org/10.48550/arXiv.2111.05599>.

It is short documentation.