Quadrature Representation

I’ve found the new form compiler TSFC to be more robust with quadrature elements. It’s not included in FEniCS by default, but it can be installed manually using pip3,

pip3 install git+https://github.com/blechta/tsfc.git@2018.1.0
pip3 install git+https://github.com/blechta/COFFEE.git@2018.1.0
pip3 install git+https://github.com/blechta/FInAT.git@2018.1.0
pip3 install singledispatch networkx pulp

then used in FEniCS Python scripts much like 'quadrature' representation:

parameters["form_compiler"]["representation"] = 'tsfc'

One other trick is that, for especially complicated Forms, I find that I sometimes need to manually raise Python’s default recursion limit, which can be done as follows:

import sys