学术报告
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17
2024-04
Action and periodic orbits of area-preserving surface diffeomorphisms动力系统讨论班 题目: Action and periodic orbits of area-preserving surface diffeomorphisms 报告人:曲华迪(南方科技大学) 摘要:We are interested in the periodic points of area-preserving diffeomorphisms on surfaces. The celebrated Poincare-Birkhoff fixed point ...
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15
2024-04
Clustered Federated Learning based on Nonconvex Pairwise Fusion题目:Clustered Federated Learning based on Nonconvex Pairwise Fusion 报告人:孙怡帆 摘要:This study investigates clustered federated learning (FL), one of the formulations of FL with non-i.i.d. data, where the devices are partitioned into clusters ...
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09
2024-04
Ambrosetti-Prodi problems for Robin (p,q)-equationsTitle: Ambrosetti-Prodi problems for Robin (p,q)-equations报告人:Vicentiu Radulescu Institute of Mathematics of the Romanian Academy, Bucharest and University of Craiova, Romania; AGH University of Krakow, Poland Abstract: I shall report o...
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09
2024-04
The connecting homomorphism in Hermitian K-theory题目:The connecting homomorphism in Hermitian K-theory 报告人:谢恒 教授(中山大学) 摘要:Higher algebraic K-theory was introduced by Daniel Quillen in 1972, earning him a Fields Medal. In his work, Quillen constructs a localization sequence, which i...
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04
2024-04
Transfer principles for Galois cohomology and Serre's Conjecture II题目:Transfer principles for Galois cohomology and Serre's Conjecture II报告人:Diego Bruno Izquierdo (法国巴黎高工)摘要:In this talk, I will present some transfer principles for the cohomological dimension of fields. I will then show some applications to S...
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04
2024-04
Borel—Serre property for Galois cohomologies题目:Borel—Serre property for Galois cohomologies 报告人:田乙胜(哈工大高等数学研究所) 摘要:In this talk, we first recall basic definitions around the $1$-st Galois cohomology set of a linear algebraic group. Subsequently, we briefly introduce the Borel—Serre...
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03
2024-04
Curvature varifolds with orthogonal boundary题目: Curvature varifolds with orthogonal boundary 报告人: Prof. Ernst Kuwert(德国Freiburg大学数学研究所) 摘要:We consider the class of surfaces in a container which meet the boundary orthogonally. We discuss area bounds in terms of a curva...
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02
2024-04
一个对龙卷风的分析题目:一个对龙卷风的分析 报告人:李天虹 副研究员、博士生导师 (中国科学院数学与系统科学研究院) 摘要:用可压缩欧拉方程的一个特解来揭示龙卷风生成的机制。 报告人简介:李天虹,美国西北大学博士,现任中国科学院数学与系统科学研究院副研究员,博士生导师。主要成果包括:补偿列紧方法证明意义下熵解的存在性;弱解的稳定性和唯一性;可压欧拉方程的特解;Hamilton-Jacobi方程解的性质;半鞅从微分流形到标架丛的水平提升系等。在Arch....
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29
2024-03
Global Well-Posedness of the 2-D Peskin Problem under Geometric ConditionsMiniworkshop on Partial Differential Equations 题目: Global Well-Posedness of the 2-D Peskin Problem under Geometric Conditions报告人: 童嘉骏 助理教授 (北京大学)摘要: The 2-D Peskin problem describes coupled motion of a 1-D closed elastic string and the ambient...
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29
2024-03
Quantitative rapid stabilization of some fluid models题目:Quantitative rapid stabilization of some fluid models报告人: 向圣权 研究员(北京大学)摘要:The control of equations is about asking oneself: if I can act on a system, what can I make it do? One of the main branches of this theory is about understanding how ...