Nodal counts for the Robin problem on Lipschitz domains
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866916673763672064 |
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| author | Gittins, Katie Hassannezhad, Asma Léna, Corentin Sher, David |
| author_facet | Gittins, Katie Hassannezhad, Asma Léna, Corentin Sher, David |
| contents | We consider the Courant-sharp eigenvalues of the Robin Laplacian for bounded, connected, open sets in $\mathbb{R}^n$, $n \geq 2$, with Lipschitz boundary. We prove Pleijel's theorem which implies that there are only finitely many Courant-sharp eigenvalues in this setting as well as an improved version of Pleijel's theorem, extending previously known results that required more regularity of the boundary. In addition, we obtain an upper bound for the number of Courant-sharp Robin eigenvalues of a bounded, connected, convex, open set in $\mathbb{R}^n$ with $C^2$ boundary that is explicit in terms of the geometric quantities of the set and the norm sup of the negative part of the Robin parameter. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2411_11427 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Nodal counts for the Robin problem on Lipschitz domains Gittins, Katie Hassannezhad, Asma Léna, Corentin Sher, David Spectral Theory 35P15, 58J50 We consider the Courant-sharp eigenvalues of the Robin Laplacian for bounded, connected, open sets in $\mathbb{R}^n$, $n \geq 2$, with Lipschitz boundary. We prove Pleijel's theorem which implies that there are only finitely many Courant-sharp eigenvalues in this setting as well as an improved version of Pleijel's theorem, extending previously known results that required more regularity of the boundary. In addition, we obtain an upper bound for the number of Courant-sharp Robin eigenvalues of a bounded, connected, convex, open set in $\mathbb{R}^n$ with $C^2$ boundary that is explicit in terms of the geometric quantities of the set and the norm sup of the negative part of the Robin parameter. |
| title | Nodal counts for the Robin problem on Lipschitz domains |
| topic | Spectral Theory 35P15, 58J50 |
| url | https://arxiv.org/abs/2411.11427 |