学术报告
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19
2025-03
Identification and Estimation for Matrix Time Series CP-factor Models题目:Identification and Estimation for Matrix Time Series CP-factor Models 报告人:常晋源教授 (西南财经大学) 摘要:We propose a new method for identifying and estimating the CP-factor models for matrix time series. Unlike the generalized eigenanalys...
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14
2025-03
“大师面对面科学普及报告”欧拉数与几何题目:“大师面对面科学普及报告”欧拉数与几何 报告人:田刚(中国科学院院士) 摘要:在这个通俗演讲中,从欧拉公式开始,引进欧拉数的概念,简述其发展历程。欧拉数是一个拓扑不变量,在数学中有很多重要应用,特别是几何学。本次报告将讨论欧拉数与几何的联系,以及在当代数学前沿之一计数几何研究中发挥的重要作用。 报告人简介:田刚,北京大学讲席教授,中国科学院院士。现任民盟中央副主席,北京大学校务委员会副主任,北京国际数学研究中心主任,还担任国家自然科学基金委天元基金领导小组组长,教...
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06
2025-03
Improved lower bounds on the minimum distances of the dual codes of primitive narrow-sense BCH codes题目:Improved lower bounds on the minimum distances of the dual codes of primitive narrow-sense BCH codes 报告人:李成举教授 (华东师范大学) 摘要:In this talk, we introduce our recent work about the lower bounds on the minimum distances of the dual codes of p...
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20
2025-01
Liouville theorems for conformally invariant fully nonlinear equations and applications题目:Liouville theorems for conformally invariant fully nonlinear equations and applications 报告人:李岩岩教授 (美国Rutgers大学) 摘要:We present new results on optimal Liouville theorems for conformally invariant fully nonlinear equations in ...
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18
2025-01
The Arnold conjecture on symplectic Orbifolds题目: The Arnold conjecture on symplectic Orbifolds 报告人:王百灵(澳大利亚国立大学) 摘要:Arnold conjecture on a closed symplectic manifold states that each Hamiltonian diffeomorphism has at least was many fixed points as the sum of all the Betti n...
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18
2025-01
Lie groupoid structures on regular Donaldson moduli spaces and applications.题目:Lie groupoid structures on regular Donaldson moduli spaces and applications. 报告人:乔帅格(北京大学) 摘要:In the study of instanton moduli spaces, e.g. Kotschick-Morgan conjecture, Witten conjecture, K-theoretical Donaldson invar...
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18
2025-01
Hamiltonian 2 group action on symplectic orbifolds and reduction题目:Hamiltonian 2 group action on symplectic orbifolds and reduction 报告人:陈柏辉(四川大学) 摘要:Symplectic reduction on symplectic manifolds is defined for Hamiltonian group actions. It has important physics backgrounds and is an operation i...
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17
2025-01
kahler compactification of C^n and reeb dynamics题目:kahler compactification of C^n and reeb dynamics 报告人:李驰教授 (Rutgers大学) 摘要:Let X be a smooth Kahler compactification of Cn such that X ⊂ C^n is a complex submanifold. We prove that X must be biholomorphic to P^n. We also prove that on C^3...
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10
2025-01
Bounding Levi-flat hypersurfaces in Stein manifolds题目:Bounding Levi-flat hypersurfaces in Stein manifolds 报告人:周正一(中科院数学所) 摘要:Let M be a smooth real codimension two compact submanifold in a Stein manifold. I will explain the following theorem: Suppose that M has two elliptic compl...
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08
2025-01
Convexity of 2-convex translating and expanding solitons to the mean curvature flow in R^{n+1}题目:Convexity of 2-convex translating and expanding solitons to the mean curvature flow in R^{n+1} 报告人:谢君明 (美国罗格斯大学) 摘要: In this talk, we will discuss the convexity of 2-convex self-similar solutions to the mean curvature flow in R...