The ring-localized MS-GFEM variant achieves nearly exponential a priori error decay in the number of local basis functions, with cheaper eigenvalue computations and a preconditioner application.
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Optimal Spectral Approximation in the Overlaps for Generalized Finite Element Methods
The ring-localized MS-GFEM variant achieves nearly exponential a priori error decay in the number of local basis functions, with cheaper eigenvalue computations and a preconditioner application.