$hp$-Version robust interior penalty discontinuous Galerkin methods for the $p$-Laplacian on simplicial and on essentially arbitrarily-shaped element meshes
Provides rigorous hp-version error analysis for a nonlinear PDE discretization on general meshes, extending theoretical foundations for discontinuous Galerkin methods.
The paper develops and analyzes an hp-version interior penalty discontinuous Galerkin method for the p-Laplacian, proving unconditional stability and a priori error estimates on simplicial and arbitrarily-shaped polygonal/polyhedral meshes. Numerical experiments confirm the theoretical results.
We consider the discretization of the $p$-Laplacian equation with an interior penalty discontinuous Galerkin method. We prove novel trace-type inverse estimates, leading to unconditional stability of the method. Further, $hp$-version a priori norm and quasi-norm error estimates are established, subordinate to available polynomial approximation results. The analysis is extended to discontinuous Galerkin methods, based on meshes with essentially arbitrarily-shaped, curved polygonal/polyhedral elements. This extension requires the proof of new $hp$-version weighted inverse estimates on essentially arbitrarily-shaped elements. Numerical experiments are also presented, highlighting the relevance of the theoretical findings.