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18

2017-09

(9月21日）Rotationally symmetry of three-dimensional steady Ricci solitons with linear curvature decay

题目: Rotationally symmetry of three-dimensional steady Ricci solitons with linear curvature decay报告人：邓宇星时间 : 2017， 9月21日（周四），10:30-11:30地点: 欧阳楼 220摘要: In this talk, we will talk about the rotationally symmetry of steady Ricci solitons with linear curvature decay. It is well-known that Brendle has proved that any three dimensional nonflat an...

14

2017-09

（9月19日）Iteration at the Boundary of Newton's Method

Title: Iteration at the Boundary of Newton's MethodSpeaker: Hongming Nie（Indiana University-Bloomington）Time: 1:30-2:30PM, September 19 (周二), 2017; 工商楼 200-9Abstract: Let NM_d be the space of degree d>2 Newton's method. We study the dynamical behaviors as maps approach to the boundary of NM_d. We prove that for a given holomorphic family of degree d Newton'...

11

2017-09

(9月15日）On the structure of cyclotomic nilHecke algebras

报告题目： On the structure of cyclotomic nilHecke algebras报告人：胡峻教授摘要： In this talk we shall consider the structure of the cyclotomic nilHecke Hecke algebras $/HH_{/ell,n}^{(0)}$, where $/ell,n/in/N$. We construct a monomial basis for $/HH_{/ell,n}^{(0)}$ which verifies a conjecture of Mathas. We show that the graded basic algebra of $/HH_{/ell,n}^{(0)}$ is commutative and hence isomor...

11

2017-09

（9月22日）Some Sophisticated Applications of the Combinatorial Nullstellensatz

Title: Some Sophisticated Applications of the Combinatorial NullstellensatzSpeaker: Professor Zhi-Wei Sun (Nanjing University)Time: 10:00-11:00am, Sep 22, 2017Venue: 200-9, Sir Run-Run Shaw Business Building, Yuquan CampusAbstract: Alon's Combinatorial Nullstellensatz (or the polynomial method) is a very useful tool in additive combinatorics. In this talk we introduce some...

05

2017-09

2017 Number Theory Days in Hangzhou(2017年杭州数论会议)

2017 Number Theory Days in Hangzhou 2017年杭州数论会议 2017年杭州数论会议将于9月22日至24日在西溪湿地西溪天堂举行，由浙江大学数学学院主办。22日（周五）会议报到，23日和24日上午学术报告，下午拟安排专场提问题和讨论（如同一年一度的美国西海岸数论会议）。目前，已有塞尔维亚数论学家、塞尔维亚科学院院士Aleksandar IVIC教授和罗马尼亚裔瑞士数论学家、德国哥廷根大学Preda Mihailescu教授应邀参加并作报告...

05

2017-09

2017 Number Theory Days in Hangzhou(2017年杭州数论会议)

2017 Number Theory Days in Hangzhou 2017年杭州数论会议 2017年杭州数论会议将于9月22日至24日在西溪湿地西溪天堂举行，由浙江大学数学学院主办。22日（周五）会议报到，23日和24日上午学术报告，下午拟安排专场提问题和讨论（如同一年一度的美国西海岸数论会议）。目前，已有塞尔维亚数论学家、塞尔维亚科学院院士Aleksandar IVIC教授和罗马尼亚裔瑞士数论学家、德国哥廷根大学Preda Mihailescu教授应邀参加并作报告...

01

2017-09

(9月5日）Semifields, Maximum Rank Distance codes and related geometric structures

Title: Semifields, Maximum Rank Distance codes and related geometric structuresSpeaker: Professor Rocco Trombetti (University of Naples Federico II) Time: 7:00-8:00pm, Sep 5, 2017Venue: 200-9, Sir Run-Run Shaw Business Building, Yuquan CampusAbstract: In the last decade maximum rank distance codes gained great interest from the part of Finite Geometers. This mainly because of their application i...

29

2017-08

(8月31日）An Index Theory for Zero Energy Solutions of the Planar Anisotropic Kepler Problem

Title: An Index Theory for Zero Energy Solutions of the Planar Anisotropic Kepler ProblemSpeaker: Guowei Yu（University of Paris-Dauphine/Paris Observatory）Time: 3:30-4:30PM, August 31 (周四), 2017; 工商楼 200-9Abstract: The planar anisotropic Kepler problem describes the motion of an electron in a semiconductor by an impurity of the donor type. In this talk, we give a complete classification of ...

25

2017-08

(8月31日） Cyclic constant-weight codes

Title： Cyclic constant-weight codesSpeaker: Professor Yanxun Chang (Beijing Jiaotong University)Time: 7:00-8:00pm, August 31, 2017Venue: 200-9, Sir Run-Run Shaw Business Building, Yuquan CampusAbstract： A cyclic $(n,d,w)_q$ code is a $q$ ary cyclic code of length $n$, minimum Hamming distance $d$ ...

25

2017-08

(8月31日） Cyclic constant-weight codes

Title： Cyclic constant-weight codesSpeaker: Professor Yanxun Chang (Beijing Jiaotong University)Time: 7:00-8:00pm, August 31, 2017Venue: 200-9, Sir Run-Run Shaw Business Building, Yuquan CampusAbstract： A cyclic $(n,d,w)_q$ code is a $q$ ary cyclic code of length $n$, minimum Hamming distance $d$ ...

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