摘 要:An important problem in numerical analysis is the solution of the Helmholtz equation in exerior domains, in variable media; this models the scattering of time-harmonic waves. The Finite Element Method (FEM) is a flexible and powerful tool for obtaining numerical solutions, but difficulties are known to arise in obtaining convergence estimates for FEM that are uniform as the frequency of ...
Abstract:A very popular method for computing approximations to the solution of the Helmholtz equation is the finite-element method (FEM), which approximates the solution as a piecewise polynomial on a mesh. When the polynomial degree is fixed and the mesh is uniform, the question of how the meshwidth must depend on the frequency has been a classic question in numerical analysis since the 1990s...