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On the design of locking free ghost penalty stabilization and the relation to CutFEM with discrete extension
UCL, London, United Kingdom.
Jönköping University, Jönköping, Sweden.
Umeå University, Faculty of Science and Technology, Department of Mathematics and Mathematical Statistics.ORCID iD: 0000-0001-5589-4521
2026 (English)In: Numerische Mathematik, ISSN 0029-599X, E-ISSN 0945-3245, Vol. 158, no 1, p. 249-280Article in journal (Refereed) Published
Abstract [en]

In this note, we introduce a novel stabilization mechanism for Cut Finite Element Methods (CutFEM), generalizing previous ghost penalty techniques in two key aspects: (1) the choice of stabilized quantities and (2) the selection of elements involved in stabilization. This approach notably allows for flexible and precise definitions of the stabilized quantities, including various functionals associated with the discrete solution, such as finite element degrees of freedom. We demonstrate that the kernel of our proposed ghost penalty operator defines a finite element space characterized by discrete extensions, closely related to those previously presented in Burman et al. (Numer Math 152(2):331–369, 2022).

Place, publisher, year, edition, pages
Springer Nature, 2026. Vol. 158, no 1, p. 249-280
National Category
Computational Mathematics
Identifiers
URN: urn:nbn:se:umu:diva-246632DOI: 10.1007/s00211-025-01502-6ISI: 001610153000001Scopus ID: 2-s2.0-105021237122OAI: oai:DiVA.org:umu-246632DiVA, id: diva2:2017021
Funder
Swedish Research Council, 2021-04925Swedish Research Council, 2022-03908eSSENCE - An eScience CollaborationAvailable from: 2025-11-27 Created: 2025-11-27 Last updated: 2026-03-24Bibliographically approved

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Larson, Mats G.

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