- Formulation with Higher-Order Hierarchical Basis Functions for Nonsimply Connected Conductors

Figure 1

The insulating region is obtained as the complement with respect to a box (not represented in the picture for clarity) of (a) a trivial conductor, (b) a solid torus, (c) a twofold solid torus, that is, a conductor with two handles.

(a)

(b)

(c)