学术报告
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31
2024-08
Long time existence for surface waves Boussinesq systems题目:Long time existence for surface waves Boussinesq systems 报告人:徐丽 教授(北京航空航天大学) 摘要:We prove long time existence results for the solutions of Boussinesq system modeling the propagation of long, weakly nonlinear water waves. ...
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31
2024-08
A priori estimate for the water waves in a corner domain题目:A priori estimate for the water waves in a corner domain 报告人: 明梅 教授 (云南大学) 摘要:We prove a weighted a priori energy estimate for the two dimensional water-waves problem with contact points in the absence of gravity and sur...
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23
2024-08
Toric Einstein 4-manifolds with nonnegative sectional curvature题目:Toric Einstein 4-manifolds with nonnegative sectional curvature 报告人:刘天约(北京大学) 摘要:We study some interesting curvature properties of Einstein 4 manifolds in the presence of symmetry. In particular we show that the only ...
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23
2024-08
Spiral minimal products题目:Spiral minimal products 报告人:张永胜教授(yl9193永利官网) 摘要:We discover a structure -- spiral minimal product (SMP) among minimal submanifolds in unit Euclidean spheres. For a pair of C-totally real minimal submanifolds f1 and f2, their...
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21
2024-08
Anisotropic capillary hypersurfaces in a wedge题目:Anisotropic capillary hypersurfaces in a wedge 报告人:马辉教授(清华大学) 摘要:Alexandrov's Soap Bubble Theorem is a fundamental result in differential geometry. In this talk we establish Minkowski formulae and a Heintze-Karcher type inequality for ...
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20
2024-08
Tangent cones of asymptotically flat 4-manifolds with cone structure题目:Tangent cones of asymptotically flat 4-manifolds with cone structure 报告人:李明阳(美国加州大学伯克利分校) 摘要:It was proved by Petrunin and Tuschmann around 2000 that for an asymptotically flat 4-manifold whose tangent cone is a metric cone...
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13
2024-08
Feynman Graph Integrals and Configuration Spaces动力系统讨论班-短课程 题目:Feynman Graph Integrals and Configuration Spaces 报告人:王明浩博士(Boston University) 摘要:In this mini-course, I will introduce Feynman graph integrals from topological and holomorphic quantum field theories. For ap...
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11
2024-08
非交换几何简介与非交换空间分类题目:非交换几何简介与非交换空间分类 报告人:龚贵华教授 (美国波多黎哥大学) 摘要:紧Hausdorff 空间以及此类空间之间的连续映射对应于含幺元交换C* 代数以及这些代数之间的同态映射。A. Connes 首先发现有很多几何拓扑对象可以对应于非交换的C*代数,因而开创了非交换几何(拓扑)的新领域。在这个报告中,我们将从一个角度(非交换商空间)来窥探非交换几何的思想,并简要介绍我本人及合作者在C*代数(非交换空间)分类方面的工作。 报告人简介:龚...
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01
2024-08
New Monge-Ampere type PDEs and canonical metrics on Hopf surfaces题目:New Monge-Ampere type PDEs and canonical metrics on Hopf surfaces 报告人:方浩(美国爱荷华大学) 摘要:We report some recent joint work with Josh Jordan in Hermitian geometry. Hopf surfaces and Inoue surfaces of type M are important type VII examp...
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23
2024-07
Twisted intertwining operators and tensor products of (generalized) twisted modules题目:Twisted intertwining operators and tensor products of (generalized) twisted modules 报告人:黄一知教授(罗格斯大学) 摘要:We introduce a more general notion of twisted intertwining operator than the one introduced by the speaker in 2017. Using t...