学术报告
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03
2018-04
Action-angle coordinates? A simple story of torus action (according to Nguyen Tien Zung) - Alain CHENCINER（巴黎七大，巴黎天文台）题目：Action-angle coordinates? A simple story of torus action (according to Nguyen Tien Zung) 报告人：Alain CHENCINER（巴黎七大，巴黎天文台） 摘要： It is well known that the existence of action-angle coordinates is intimately related to the torus action associ...
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02
2018-04
Recent results on nonuniqueness of admissible solutions to the Riemann problem for multi-D isentropic Euler equations - Professor Ondrej Kreml（Institute of Mathematics, Czech Academy of Sciences）题目：Recent results on nonuniqueness of admissible solutions to the Riemann problem for multi-D isentropic Euler equations 报告人：Professor Ondrej Kreml（Institute of Mathematics, Czech Academy of Sciences） 摘要： In this talk we survey recent result...
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30
2018-03
On p-adic Gelfand-Kapranov-Zelevinksy hypergeometric systems - 扶磊教授（清华大学）题目：On p-adic Gelfand-Kapranov-Zelevinksy hypergeometric systems 报告人：扶磊教授（清华大学） 摘要： We construct a complex of arithmetic D-modules so that traces of Frobenius are given by the hypergeometric exponential sums. 时间：3月30日（周五）下午4:30-5:30 ...
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29
2018-03
Regularity for the Navier-Stokes equations via Liouville type theorems - Prof. Gregory Seregin（牛津大学 & Steklov 数学研究所）题目：Regularity for the Navier-Stokes equations via Liouville type theorems 报告人：Professor Gregory Seregin（Oxford University, UK and St Petersburg Department of Steklov Mathematical Institute, RAS, Russia） 报告人简介：G. Seregin教授1979年毕业于前苏联Leningrad Po...
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28
2018-03
Asymptotic behavior and blow-up of solutions for infinitely degenerate semilinear parabolic equations with logarithmic nonlinearity - 陈化教授（武汉大学）题目：Asymptotic behavior and blow-up of solutions for infinitely degenerate semilinear parabolic equations with logarithmic nonlinearity 报告人：陈化教授（武汉大学） 摘要： In this talk, we consider the initial-boundary value problem for infinitely degenerate ...
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27
2018-03
On Shadow Systems of the Stationary Shigesada-Kawasai -Teramoto Model - Prof. Kousuke Kuto（University of Electro Communications, Japan）题目：On Shadow Systems of the Stationary Shigesada-Kawasai -Teramoto Model 报告人: Prof. Kousuke Kuto（University of Electro Communications, Japan） Abstract: A diffusive Lotka-Volterra competition model with cross-diffusion proposed by Shigesad...
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26
2018-03
从Kepler问题谈起 - 周坚教授（清华大学）题目：从Kepler问题谈起 报告人： 周坚教授（清华大学） 摘要：Kepler问题是牛顿力学中最早解决的问题之一，Kepler系统也是最早发现的可积系统之一，但是这方面的研究至今仍然很活跃。本报告介绍在1970年代Moser, Souriau， Rawnsley等人的工作上的基础上的最新进展，包括Martelli-Sparks-Yau等人在AdS/CFT对应中发展的方法的应用，以及该方法对Gibbons-Hawking空间的应用。这些是超弦理论方法对传统引力问题的应用的尝试。 ...
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23
2018-03
Counting roots for polynomials modulo prime powers - 万大庆教授（美国加州大学Irvine分校）题目：Counting roots for polynomials modulo prime powers 报告人：万大庆教授（美国加州大学Irvine分校） 摘要： Suppose p is a prime, t is a positive integer, and f(x) in Z[x] is a polynomial of degree d. We show that for any fixed t, we can compute the number of roots...
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23
2018-03
Non-abelian Iwasawa Theory - 万大庆教授（美国加州大学Irvine分校）题目：Non-abelian Iwasawa Theory 报告人：万大庆教授（美国加州大学Irvine分校） 摘要： For a Z_p-tower of global fields, Iwasawa's classical theorem says that the exponent of p in the n-th class number of the tower is given by a linear polynomial in p^n and n for larg...
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23
2018-03
Global bifurcation structure of steady-states for a nonlocal Allen-Cahn equation in dimension one - Prof. Kousuke Kuto（University of Electro Communications, Japan）题目：Global bifurcation structure of steady-states for a nonlocal Allen-Cahn equation in dimension one 报告人: Prof. Kousuke Kuto（University of Electro Communications, Japan） Abstract: This talk is concerned with the Neumann problem of the 1D st...