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math.NA2024
Two-level Restricted Additive Schwarz preconditioner based on Multiscale Spectral Generalized FEM for Heterogeneous Helmholtz Problems
Chupeng Ma, Christian Alber, Robert Scheichl +1
We present and analyze a two-level restricted additive Schwarz (RAS) preconditioner for heterogeneous Helmholtz problems, based on a multiscale spectral generalized finite element…
math.NA2024★ 1 cited
Fast-convergent two-level restricted additive Schwarz methods based on optimal local approximation spaces
Arne Strehlow, Chupeng Ma, Robert Scheichl
This paper proposes a two-level restricted additive Schwarz (RAS) method for multiscale PDEs, built on top of a multiscale spectral generalized finite element method (MS-GFEM). The…
math.NA2024
A Mixed Multiscale Spectral Generalized Finite Element Method
Christian Alber, Chupeng Ma, Robert Scheichl
We present a multiscale mixed finite element method for solving second order elliptic equations with general -coefficients arising from flow in highly heterogeneous por…