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Preprint Oct 2026

An algebraic multiscale framework for two-level overlapping Schwarz preconditioners

The robustness of two-level overlapping additive Schwarz (OAS) preconditioners for highly heterogeneous elliptic problems hinges on the choice of the coarse space. We propose an algebraic multiscale (AM) coarse space built from the system matrix alone through an algebraic formulation of the multiscale finite element me...

Filipe Cumaru, H. Hajibeygi, C. Vuik et al. · 0 citations

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