Dear Firedrakers,

I would like to use continuous finite elements from the serendipity family. At the moment, I would like to use some simple quadratic 8-nodes quadrangles and 20-nodes hexaedra (the S2 element from the “Periodic table of the finite elements”).

I do not find any tests in Firedrake src (grep -ri functionspace * | grep \"S).

How can I do to use these finite elements?

Thanks,

Nicolas