Modeling electromagnetics on cylindrical meshes with applications to steel-cased wells

GMσee=qe=Gϕ\begin{split} - \mathbf{G}^\top \mathbf{M}_{\boldsymbol{\sigma}}^e \mathbf{e} &= \mathbf{q} \\ \mathbf{e} &= -\mathbf{G}\boldsymbol{\phi} \end{split}