Author

Michał Wichrowski

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Preprint Sep 2026

A Multigrid Method for CutFEM and its Convergence

We develop a convergence theory for geometric multigrid with vertex-patch smoothers applied to cut finite element discretizations of the Poisson problem. The framework addresses non-inherited level forms and the mismatch between the physical and active domains. Using the discrete extension property, we prove two-level...

Michał Wichrowski · 1 citation