Log-Concavity and Fundamental Gaps on Surfaces of Positive Curvature
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2022
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| _version_ | 1866929609006645248 |
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| author | Khan, Gabriel Nguyen, Xuan Hien Tuerkoen, Malik Wei, Guofang |
| author_facet | Khan, Gabriel Nguyen, Xuan Hien Tuerkoen, Malik Wei, Guofang |
| contents | We study the log-concavity of the first Dirichlet eigenfunction of the Laplacian for convex domains. For positively curved surfaces satisfying a condition involving the curvature and its second derivatives, we show that the first eigenfunction is strongly log-concave. Previously, for general convex domains, the log-concavity of the first eigenfunctions were only known when lying in $\mathbb{R}^n$ and $\mathbb{S}^n$. Using this estimate, we establish lower bounds on the fundamental gap of such regions. Furthermore, we study the behavior of these estimates under Ricci flow and other deformations of the metric. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2211_06403 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Log-Concavity and Fundamental Gaps on Surfaces of Positive Curvature Khan, Gabriel Nguyen, Xuan Hien Tuerkoen, Malik Wei, Guofang Differential Geometry Analysis of PDEs 58J50 35P15 We study the log-concavity of the first Dirichlet eigenfunction of the Laplacian for convex domains. For positively curved surfaces satisfying a condition involving the curvature and its second derivatives, we show that the first eigenfunction is strongly log-concave. Previously, for general convex domains, the log-concavity of the first eigenfunctions were only known when lying in $\mathbb{R}^n$ and $\mathbb{S}^n$. Using this estimate, we establish lower bounds on the fundamental gap of such regions. Furthermore, we study the behavior of these estimates under Ricci flow and other deformations of the metric. |
| title | Log-Concavity and Fundamental Gaps on Surfaces of Positive Curvature |
| topic | Differential Geometry Analysis of PDEs 58J50 35P15 |
| url | https://arxiv.org/abs/2211.06403 |