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math.NA2023★ 3 cited

Optimal complexity of goal-oriented adaptive FEM for nonsymmetric linear elliptic PDEs

Philipp Bringmann, Maximilian Brunner, Dirk Praetorius +1

We analyze a goal-oriented adaptive algorithm that aims to efficiently compute the quantity of interest with a linear goal functional and the solution to…

math.NA2023★ 1 cited

Optimally truncated WKB approximation for the highly oscillatory stationary 1D Schrödinger equation

Jannis Körner, Anton Arnold, Christian Klein +1

We discuss the numerical solution of initial value problems for in the highly oscillatory regime, i.e., with and . We an…

math.NA2023★ 3 cited

Structure preservation in high-order hybrid discretisations of potential-driven advection-diffusion: linear and nonlinear approaches

Simon Lemaire, Julien Moatti

We are interested in the high-order approximation of anisotropic, potential-driven advection-diffusion models on general polytopal partitions. We study two hybrid schemes, both bui…

math.NA2023

Sparse grid approximation of nonlinear SPDEs: The Landau--Lifshitz--Gilbert equation

Xin An, Josef Dick, Michael Feischl +2

We show convergence rates for a sparse grid approximation of the distribution of solutions of the stochastic Landau-Lifshitz-Gilbert equation. Beyond being a frequently studied equ…

math.NA2023

Error Analysis of an HDG Method with Impedance Traces for the Helmholtz Equation

Michael Leumüller, Joachim Schöberl

In this work, a novel analysis of a hybrid discontinuous Galerkin method for the Helmholtz equation is presented. It uses wavenumber, mesh size and polynomial degree independent st…

math.NA2023

Stability Analysis for Electromagnetic Waveguides. Part 1: Acoustic and Homogeneous Electromagnetic Waveguides

Jens Markus Melenk, Leszek Demkowicz, Stefan Henneking

In a time-harmonic setting, we show for heterogeneous acoustic and homogeneous electromagnetic wavesguides stability estimates with the stability constant depending linearly on the…