An arbitrary order Reconstructed Discontinuous Approximation to Fourth-order Curl Problem

We present an arbitrary order discontinuous Galerkin finite element method for solving the fourth-order curl problem using a reconstructed discontinuous approximation method. It is based on an arbitrarily high-order approximation space with one unknown per element in each dimension. The discrete problem is based on the symmetric IPDG method. We prove a priori error estimates under the energy norm and the L² norm and show numerical results to verify the theoretical analysis.