Analysis of injection operators in multigrid solvers for hybridized discontinuous Galerkin methods

• Verfasst von: Lu, Peipei [VerfasserIn]
• Verfasst von: Rupp, Andreas [VerfasserIn]
• Verfasst von: Kanschat, Guido [VerfasserIn]
• Titel: Analysis of injection operators in multigrid solvers for hybridized discontinuous Galerkin methods
• Verf.angabe: Peipei Lu, Andreas Rupp, and Guido Kanschat
• E-Jahr: 2021
• Jahr: 31 Mar 2021
• Umfang: 21 S.
• Fussnoten: Gesehen am 29.09.2022
• Titel Quelle: Enthalten in: De.arxiv.org
• Ort Quelle: [S.l.] : Arxiv.org, 1991
• Jahr Quelle: 2021
• Band/Heft Quelle: (2021), Artikel-ID 2104.00118, Seite 1-21
• DOI: doi:10.48550/arXiv.2104.00118
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: 65F10, 65N30, 65N50
• Sach-SW: Mathematics - Numerical Analysis
• K10plus-PPN: 1817790269

Abstract

Uniform convergence of the geometric multigrid V-cycle is proven for HDG methods with a new set of assumptions on the injection operators from coarser to finer meshes. The scheme involves standard smoothers and local solvers which are bounded, convergent, and consistent. Elliptic regularity is used in the proofs. The new assumptions admit injection operators local to a single coarse grid cell. Examples for admissible injection operators are given. The analysis applies to the hybridized local discontinuous Galerkin method, hybridized Raviart-Thomas, and hybridized Brezzi-Douglas-Marini mixed element methods. Numerical experiments are provided to confirm the theoretical results.