Analysis of injection operators in multigrid solvers for hybridized discontinuous Galerkin methods
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arXiv
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| Hauptverfasser: | , , |
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| Format: | Preprint |
| Veröffentlicht: |
2021
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| _version_ | 1866917562865942528 |
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| author | Lu, Peipei Rupp, Andreas Kanschat, Guido |
| author_facet | Lu, Peipei Rupp, Andreas Kanschat, Guido |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2104_00118 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | Analysis of injection operators in multigrid solvers for hybridized discontinuous Galerkin methods Lu, Peipei Rupp, Andreas Kanschat, Guido Numerical Analysis 65F10, 65N30, 65N50 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. |
| title | Analysis of injection operators in multigrid solvers for hybridized discontinuous Galerkin methods |
| topic | Numerical Analysis 65F10, 65N30, 65N50 |
| url | https://arxiv.org/abs/2104.00118 |