All Seminars & Colloquia
Border-Collision Bifurcations in A Piece-Wise Smooth Planar Dynamical System Associated with Cardiac Potential
Tuesday, 2/25/2014, 8:00pm - 11:59pm
Speaker: Irina Popovici, US Naval Academy
Time:Tuesday, February 25, 3:00 PM
Abstract: The talk addresses the bifurcations of a two-dimensional non-linear dynamical system introduced by Kline and Baker to model cardiac rhythmic response to periodic stimulation. The dynamical behavior of this continuous (but only piece-wise smooth) model transitions from simple (a unique attracting cycle) to complicated (co-existence of stable cycles) as the stimulus period is decreased from large towards zero.
Introduction to twist spinning of knots; II
Tuesday, 2/25/2014, 6:00pm - 11:59pm
Speaker: Seung Yeop Yang (GWU)
A Liouville-type theorem for higher order elliptic systems
Friday, 2/21/2014, 9:00pm - 11:59pm
Speaker: Mingfeng Zhao, University of Connecticut.
Abstract: By using a Rellich-Pohozaev identity and an adapted Souplet's idea about the measure and feedback arguments, we prove that there are no positive solutions to higher order Lane-Emden system provided some conditions. Our result is a higher order analogue of Souplet's result for Lane-Emden system. This is a joint work with Frank Arthur and Xiaodong Yan.
Topological Mixing Tilings of $\mathbb{R}^2$ Generated by a Generalized Substitution
Friday, 2/21/2014, 8:00pm - 11:59pm
Speaker: Tyler White, Northern Virginia Community College
Abstract: Kenyon, in his 1996 paper, gave a class of examples of tilings of \mathbb{R}^2 constructed from generalized substitutions. These examples are topologically conjugate to self-similar tilings of the plane (with fractal boundaries). I have proven that an infinite sub-family of Kenyon's examples are topologically mixing. These are the first known examples of topologically mixing substitution tiling dynamical systems of \mathbb{R^2}.
Colloquia joint with AMW Chapter of GWU
Stability of Soliton Solutions to the Korteweg-deVries Equation
Friday, 2/21/2014, 6:00pm - 11:59pm
Models for “mixtures” ; multifluid flows
Thursday, 2/20/2014, 8:00pm - 11:59pm
An Introduction to twist spinning of knots
Tuesday, 2/18/2014, 6:00pm - 11:59pm
An Introduction to twist spinning of knots
Speaker: Seung Yeop Yang (GWU)
Geomterization Program of Semilinear Elliptic PDEs
Thursday, 2/13/2014, 7:20pm - 11:59pm
Abstract: Understanding the entire solutions of nonlinear elliptic equations