Mixed Poisson Demo with dolfinx_mpc periodic BC

[dokken]

See:

Does DOLFINX_MPC have the support for Nedelec element

Currently no, but you can call it with a single map, as for instance done in: which was made together with Cristian Ciraci. In theory, one could simplify the code I have made by using information from GMSH. I’ve not had time to do this yet. In the aforementioned example you see gmsh being used for the periodic map on a cube. The function from script.py should work with MPI out of the box.