I am trying to implement periodic boundary conditions in fenicsx. I found a code shared by Dokken here for periodic boundary conditions in Poission 2D. But it was meant for dolfin and not dolfinx. So I have been trying to modify it to execute it using dolfinx. An image for the code is shared here.
Please read Read before posting: How do I get my question answered? . Never post your code and your error as images: they are impossible to copy and paste, impossible to search, and sometimes difficult to even read (look at how small the font is in your first picture, and imagine I was reading this message from a cellphone)
Look at GitHub - jorgensd/dolfinx_mpc: Extension for dolfinx to handle multi-point constraints. for periodic BCs (and much more) in dolfinx.
Thanks a lot for the help. I will keep in mind your advice for future.
A demo is available here: Periodic homogenization of linear elasticity — Computational Mechanics Numerical Tours with FEniCSx
