David A. Ham
Something is not quite right in the logic of extracting domains when applied to nested BaseForms. @nbouziani ?
I think I don't understand where the solve comes into this (or the derivative, for that matter). Can you show us mathematically what you are trying to do?
Well if you build a LVP or call solve on a linear system you also don't get a derivative, but I don't actually see where the system is here.
OK, I think if you set up a `LinearVariationalProblem` then you will avoid this derivative. There is really no need for a derivative to be happening in this case. I...