All Seminars & Colloquia

Friday, 10/31/2014, 5:00pm - 11:59pm

Speaker: Carl Hammarsten (GWU)
Title: Combinatorial Heegaard Floer Homology and Decorated Heegaard Diagrams.
Time: 1:00-2:00pm, Oct. 31

Analysis Seminar

Rigidity Sequences for Rationally Ergodic Maps

Friday, 10/24/2014, 7:00pm - 11:59pm

Speaker: Brooke Yancey of the University of Maryland.

colloquium

Spectral Methods in Motion

Thursday, 10/16/2014, 7:00pm - 11:59pm

Speaker: David Kopriva (Florida State University)

Data MASTER Seminar*

Complex Network Analysis using Mathematica

Tuesday, 10/14/2014, 3:10pm - 11:59pm

Speaker: Chenghang Du, GW

Abstract: This is a hands-on workshop aimed at undergraduate students and other interested audience. I will walk you through some examples of using Mathematica for complex network analysis. I will also outline a few potential projects, including collaboration network, Boolean dynamics, social network, and time series analysis. Students are welcomed to bring laptop to the workshop.

colloquium

Minimal length elements: some interaction between

Friday, 10/10/2014, 5:00pm - 11:59pm

Speaker: Xuhua He (University of Maryland)

Title: Minimal length elements: some interaction between combinatorics, representation theory, and arithmetic geometry

Abstract: The study of minimal length elements in a conjugacy class of a Weyl group arises in the study of representation theory. Minimal length elements have many remarkable combinatorial properties.

Logic Seminar

Effective classification of computable structures

Friday, 9/26/2014, 6:30pm - 11:59pm

Time: Friday, 9/26, 2:30-3:30pm

Speaker: Russell Miller, City University of New York

http://qcpages.qc.cuny.edu/~rmiller/

Colloquium

Is the Solar system stable? — a historical topic revisited

Friday, 9/26/2014, 5:00pm - 11:59pm

This event is co-sponsored by the GW Confucius Institute

Speaker: Cheng Chong-Qing, Nanjing University

Abstract: The system I am going to talk about is an idealized model: to study n mass points which move in 3 dimensional space according to Newton’s law. We assume further that n-1 of these fictions mass points havevery small masses compared to the remaining one, which plays the role of the sun. I shall introduce some ideas to study this problem and give a brief review on new progress in the field.

Logic Seminar

Computable Isomorphisms between Partial Computable Injection Structures

Friday, 9/19/2014, 6:30pm - 11:59pm

Speaker: Leah Marshall, GWU (graduate student)

Data MASTER seminar

Mathematics and Science of Complex Networks

Thursday, 9/18/2014, 3:10pm - 11:59pm

Speaker: Yongwu Rong (GWU)

Abstract: Complex networks arise naturally in many disciplines, from computer networks to interactions of biological cells, from air traffic design to social networks. Over the past decade, there has been a great deal of new interests in this field, largely due to the explosive amount of data on various networks. An urgent need now is to extract useful information to understand the structure of these networks.

Logic -Topology Seminar

Simplicial modules, quantum plane and q-polynomial of rooted trees

Friday, 9/12/2014, 6:30pm - 11:59pm

Speaker: Przytycki, Jozef (GWU)

Abstract: For the 30th anniversary of the Homflypt polynomial of links, I propose
a new polynomial invariant of rooted trees. I will relate this to the Kauffman bracket (version of the Jones polynomial)
and to (pre)simplicial categories.