2008年08月03日

美国Princeton大学数学系张圣容教授(Chang, Sun-Yung Alice)和杨健平教授(Paul C.Yang) 将于8月4日至6日访问我系。

张圣容教授今年新当选为美国科学院院士.

杨健平教授将作学术报告
报告题目：The Q-curvature Equation in conformal and CR geometry
报告时间：2008年8月5日上午10:00-11:00
报告地点：理科大楼A1510

2008年07月22日

《曹锡华代数论坛》系列学术报告

详情请见下面的链接：http://math.ecnu.edu.cn/academia/cxh.htm

Title: The Combinatorics of Involutions and Twisted Involutions in Weyl groups

By Prof. Ruth Haas (Head of Department of Mathematics, Smith College, USA)

Place: Science Bilding, A510

Time: 2:00---3:00, July 23


Title: Orbit decompositions in symmetric spaces

By Prof. Aloysius Helminck (Head of Department of Mathematics, North Carolina State University)

Place: Science Bilding, A510

Time: 3:00---4:00, July 23


Title: On Realizations of toroidal Lie alebras
By Prof. Naihuan Jing (Department of Mathematics, North Carolina State University)

Place: Science Bilding, A510

Time: 4:00---5:00, July 23


Title: Hopf algebra with trace and representation

By Prof. Marc Rosso (Head of Department of Mathematics, ENS de Paris, France)

Place: Small Teaching Building, Rom 305 (小教学楼301)

Time: 8:10---9:10, July 24


Title: Root systems and Weyl groupoids for Nichols algebras

By Prof. Istvan Heckenberger (Mathematics Institute, University of Munich, Germany)

Place: Small Teaching Building, Rom 305 (小教学楼301)

Time: 9:20---10:20, July 24


Title: eu_2 Lie admissible algebras

By Prof. Yun Gao (Department of Mathematics and Stastics, York University, Canada)

Place: Small Teaching Building, Rom 305 (小教学楼301)

Time: 10:30---11:30, July 24


Title: 关于计算机系统的可证明安全性

By Prof. Gang Xiao (University of Nice, France)

Place: Small Teaching Building, Rom 305 (小教学楼301)

Time: 4:00---5:00, July 24

2008年06月30日

校 级 学 术 报 告
(曹 锡 华 代 数 论 坛)

报告题目：Partitions, algebraic geometry and representation theory
时间： 2008.7.8（周二下午）15：00 --- 16：00
地点： 中山北路校区，理科大楼 A1510
主讲人： Zhenbo Qin 教授 (美国University of Missouri)
内容简介:
We use the Hilbert schemes of points on complex surfaces to illustrate interplay among combinatorics, algebraic geometry and representation theory. The basic model is the Hilbert schemes of points on the complex plane, whose Euler characteristics coincides with the number of partitions. Its cohomology group follows from H. Nakajima's construction of an infinite dimensional Heisenberg algebra action. For the Hilbert schemes of points on an arbitrary complex surface, we review the main results obtained in a series of joint papers (with W.-P. Li and W. Wang) via vertex algebra techniques and their connections with works of A. Okounkov and R. Pandharipande. We end with a discussion of Y. Ruan's Cohomological Crepant Resolution Conjecture for these Hilbert schemes.

欢迎广大师生参加!
数学系
2008年6月30日

2008年06月18日

校 级 学 术 报 告
(曹 锡 华 代 数 论 坛)

报告题目：Quasimodular Forms and Mirror Symmetry for Elliptic Curves
时间： 2008.6.30（周一）15：00 --- 16：00
地点： 闵行校区数学楼报告厅
主讲人： Noriko Yui教授 (加拿大Queen’s University, Kingston)
内容简介:
　　We look into the formula, due to Douglas and Dijkgraaf, on the generating function, Fg(q), of the number of simply ramified covers of genus g≥1 over a fixed elliptic curve with marked points. Their result is that Fg(q) is a quasimodular form of weight 6g − 6 on the full modular group PSL(2,Z). There are two ways of computing Fg(q): the fermionic count and the bosonic count. The fermionic counting is a mathematical treatment, and we will give a mathematical proof to the formula. On the other hand, the bosonic counting rests on physical arguments, which involves path integrals on trivalent Feynman diagrams. We will compute Fg(q) for small genera with bosonic count. This establishes the mirror symmetry prediction for elliptic curves for small genera. When genus g gets bigger, inductive structures in Feynman diagrams might shed light on the calculations of Fg(q).

　　　　欢迎广大师生参加!
　　　　数学系
　　　　2008年6月18日

2008年06月09日

报告人：徐树方 教授 （北京大学数学学院）
时间：6月10日（周二）
上午10点和下午3点两场
地点：闵行数学楼126室
题目：1，A new eigenvalue embedding approach for finite element model updating
2, A structure –preserving doubling algorithm for nonsymmetric algebraic Riccati equation

摘要下载： EEP-ab.pdf

SDA-NARE-ab.pdf