The Ricci curvature and the normalized Ricci flow on the Stiefel manifolds $ \operatorname{SO}(n)/\operatorname{SO}(n-2) $
We proved that on every Stiefel manifold $ V_2\mathbb{R}^n\cong \operatorname{SO}(n)/\operatorname{SO}(n-2) $ with $ n\ge 3 $ the normalized Ricci flow preserves the positivity of the Ricci curvature of invariant Riemannian metrics with positive Ricci curvature. Moreover, the normalized Ricci flow e...
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AIMS Press
2025-03-01
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| Series: | Electronic Research Archive |
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| Online Access: | https://www.aimspress.com/article/doi/10.3934/era.2025084 |
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| author | Nurlan A. Abiev |
| author_facet | Nurlan A. Abiev |
| author_sort | Nurlan A. Abiev |
| collection | DOAJ |
| description | We proved that on every Stiefel manifold $ V_2\mathbb{R}^n\cong \operatorname{SO}(n)/\operatorname{SO}(n-2) $ with $ n\ge 3 $ the normalized Ricci flow preserves the positivity of the Ricci curvature of invariant Riemannian metrics with positive Ricci curvature. Moreover, the normalized Ricci flow evolves all metrics with mixed Ricci curvature into metrics with positive Ricci curvature in finite time. From the point of view of the theory of dynamical systems, we proved that for every invariant set $ \Sigma $ of the normalized Ricci flow on $ V_2\mathbb{R}^n $ defined as $ x_1^{n-2}x_2^{n-2}x_3 = c $, $ c > 0 $, there exists a smaller invariant set $ \Sigma\cap \mathscr{R}_{+} $ for every $ n\ge 3 $, where $ \mathscr{R}_{+} $ is the domain in $ \mathbb{R}_{+}^3 $ responsible for parameters $ x_1, x_2, x_3 > 0 $ of invariant Riemannian metrics on $ V_2\mathbb{R}^n $ admitting positive Ricci curvature. |
| format | Article |
| id | doaj-art-ed1f7b268fea4ce8a2e18a1c7e01a50d |
| institution | OA Journals |
| issn | 2688-1594 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | AIMS Press |
| record_format | Article |
| series | Electronic Research Archive |
| spelling | doaj-art-ed1f7b268fea4ce8a2e18a1c7e01a50d2025-08-20T01:54:41ZengAIMS PressElectronic Research Archive2688-15942025-03-013331858187410.3934/era.2025084The Ricci curvature and the normalized Ricci flow on the Stiefel manifolds $ \operatorname{SO}(n)/\operatorname{SO}(n-2) $Nurlan A. Abiev0Institute of Mathematics of NAS of the Kyrgyz Republic, Bishkek 720071, Kyrgyz RepublicWe proved that on every Stiefel manifold $ V_2\mathbb{R}^n\cong \operatorname{SO}(n)/\operatorname{SO}(n-2) $ with $ n\ge 3 $ the normalized Ricci flow preserves the positivity of the Ricci curvature of invariant Riemannian metrics with positive Ricci curvature. Moreover, the normalized Ricci flow evolves all metrics with mixed Ricci curvature into metrics with positive Ricci curvature in finite time. From the point of view of the theory of dynamical systems, we proved that for every invariant set $ \Sigma $ of the normalized Ricci flow on $ V_2\mathbb{R}^n $ defined as $ x_1^{n-2}x_2^{n-2}x_3 = c $, $ c > 0 $, there exists a smaller invariant set $ \Sigma\cap \mathscr{R}_{+} $ for every $ n\ge 3 $, where $ \mathscr{R}_{+} $ is the domain in $ \mathbb{R}_{+}^3 $ responsible for parameters $ x_1, x_2, x_3 > 0 $ of invariant Riemannian metrics on $ V_2\mathbb{R}^n $ admitting positive Ricci curvature.https://www.aimspress.com/article/doi/10.3934/era.2025084stiefel manifoldriemannian metricnormalized ricci flowricci curvaturedynamical systeminvariant setsingular point |
| spellingShingle | Nurlan A. Abiev The Ricci curvature and the normalized Ricci flow on the Stiefel manifolds $ \operatorname{SO}(n)/\operatorname{SO}(n-2) $ Electronic Research Archive stiefel manifold riemannian metric normalized ricci flow ricci curvature dynamical system invariant set singular point |
| title | The Ricci curvature and the normalized Ricci flow on the Stiefel manifolds $ \operatorname{SO}(n)/\operatorname{SO}(n-2) $ |
| title_full | The Ricci curvature and the normalized Ricci flow on the Stiefel manifolds $ \operatorname{SO}(n)/\operatorname{SO}(n-2) $ |
| title_fullStr | The Ricci curvature and the normalized Ricci flow on the Stiefel manifolds $ \operatorname{SO}(n)/\operatorname{SO}(n-2) $ |
| title_full_unstemmed | The Ricci curvature and the normalized Ricci flow on the Stiefel manifolds $ \operatorname{SO}(n)/\operatorname{SO}(n-2) $ |
| title_short | The Ricci curvature and the normalized Ricci flow on the Stiefel manifolds $ \operatorname{SO}(n)/\operatorname{SO}(n-2) $ |
| title_sort | ricci curvature and the normalized ricci flow on the stiefel manifolds operatorname so n operatorname so n 2 |
| topic | stiefel manifold riemannian metric normalized ricci flow ricci curvature dynamical system invariant set singular point |
| url | https://www.aimspress.com/article/doi/10.3934/era.2025084 |
| work_keys_str_mv | AT nurlanaabiev thericcicurvatureandthenormalizedricciflowonthestiefelmanifoldsoperatornamesonoperatornameson2 AT nurlanaabiev riccicurvatureandthenormalizedricciflowonthestiefelmanifoldsoperatornamesonoperatornameson2 |