Domain Decomposition Preconditioning for Discontinuous Galerkin Approximations of Convection-Diffusion Problems

In the classical Schwarz framework for conforming approximations of non-symmetric and indefinite problems [5, 6] the finite element space is optimally decomposed into the sum of a finite number of uniformly overlapped, two-level subspaces. In each iteration step, a coarse mesh problem and a numbe