I would be interested in solving the biharmonic equation with Dirichlet and Neumann boundary conditions using a conforming finite element method, i.e., the finite dimensional spaces are always subspaces of the Sobolev space where solutions are sought.
According to Cahpter 6 of the monograph by Ciarlet(1978), such a discretisation can be performed using, for instance, the Hsieh-Clough-Tocher triangle (a.k.a. HCT).
I long searched for such an element, but I could not find it in the Fenics library.
Do you know how I could load the HCT element library onto my python script (if it is possible, of course)?
Many thanks in advance and best regards