Lower Ricci Curvature Bounds and the Orientability of Spaces
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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_ | 1866910764764233728 |
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| author | Brena, Camillo Bruè, Elia Pigati, Alessandro |
| author_facet | Brena, Camillo Bruè, Elia Pigati, Alessandro |
| contents | We study orientability in spaces with Ricci curvature bounded below. Building on the theory developed by Honda, we establish equivalent characterizations of orientability for Ricci limit and RCD spaces in terms of the orientability of their manifold part. We prove a new stability theorem and, as a corollary, we deduce that four-manifolds with Ricci curvature bounded below and volume non-collapsing are uniformly locally orientable. As a global counterpart of the latter, we show that four-manifolds with nonnegative Ricci curvature and Euclidean volume growth are orientable. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_19288 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Lower Ricci Curvature Bounds and the Orientability of Spaces Brena, Camillo Bruè, Elia Pigati, Alessandro Differential Geometry We study orientability in spaces with Ricci curvature bounded below. Building on the theory developed by Honda, we establish equivalent characterizations of orientability for Ricci limit and RCD spaces in terms of the orientability of their manifold part. We prove a new stability theorem and, as a corollary, we deduce that four-manifolds with Ricci curvature bounded below and volume non-collapsing are uniformly locally orientable. As a global counterpart of the latter, we show that four-manifolds with nonnegative Ricci curvature and Euclidean volume growth are orientable. |
| title | Lower Ricci Curvature Bounds and the Orientability of Spaces |
| topic | Differential Geometry |
| url | https://arxiv.org/abs/2412.19288 |