Dear FENICS experts,
I'm new in FENICs and I'm interfacing dolfin with PCBDDC solver in PETSc (see here ) for solving curl-curl problems in 3D with nedelec elements. For optimal convergence of the method, I need to generate a Function defined on the nedelec elements which defines the quadrature rule for the following integrals
$$\int_E {\bf w} \cdot {\bf t_e} ds $$ and $$\int_E s {\bf w} \cdot {\bf t_e} ds $$
where E is a set of element edges (namely those located on the interface between subdomains), w is a function in the Nedelec space, t_e is the tangent unit vector on each edge and s is an arc length parameters. What is the best way of implementing them? For 3D problems, the ds you can use for integration is for facets, thus not for edges.
Thanks,
Stefano
