Wavenumber explicit convergence of a multiscale GFEM for heterogeneous Helmholtz problems. - Chupeng Ma; Christian Alber; Robert Scheichl (CoRR, 2021)

Wavenumber Explicit Convergence of a Multiscale Generalized Finite Element Method for Heterogeneous Helmholtz Problems. - Chupeng Ma; Christian Alber; Robert Scheichl (SIAM J. Numer. Anal., 2023)

Two-level Restricted Additive Schwarz preconditioner based on Multiscale Spectral Generalized FEM for Heterogeneous Helmholtz Problems. - Chupeng Ma; Christian Alber; Robert Scheichl (CoRR, 2024)

A mixed multiscale spectral generalized finite element method. - Christian Alber; Chupeng Ma; Robert Scheichl (Numerische Mathematik, 2025)

Optimal Spectral Approximation in the Overlaps for Generalized Finite Element Methods. - Christian Alber; Peter Bastian; Moritz Hauck; Robert Scheichl (CoRR, 2025)