Dear Nicolas,

> On 27 Jan 2020, at 14:28, Karin&NiKo <niko.karin@gmail.com> wrote:
>
> Dear Firedrakers,
>
> I apologize to insist on the topic of serendipity finite elements. Perhaps my previous message was unclear.
> I would like to define some simple serendipity quadratic 8-nodes quadrangles and 20-nodes hexaedrain Firedrake but I do not know how to do it.

Apologies for the delayed response. We do have implementations of serendipity elements available, however they are not merged into the master branch yet. I do not recall exactly the state of play in terms of which branches you need, perhaps Rob Kirby can comment.

Thanks,

Lawrence