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DynamIC Seminars
(
Complete List
)
Name
Title
Date
Time
Room
André de Carvalho
(USP)
TBSpAgs: Super generalized pseudo-Anosov maps
Abstract:
The purpose of this talk is not to set a new record for the number of noun modifiers in mathematical definitions, but to present a construction which applies to graph maps in general and yields interesting surface homeomorphisms as follows: 1) a pseudo-Anosov map if the graph map is a train track map; 2) a generalized pseudo-Anosov map if the graph map is post-critically finite and has an irreducible aperiodic transition matrix; 3) an interesting type of surface homeomorphisms which generalizes both the previous classes otherwise. In particular, this produces a unified construction of surface homeomorphisms whose dynamics mimics that of the tent family of interval endomorphisms, completing an earlier construction of unimodal generalized pseudo-Anosov maps in the post-critically finite case. This is joint work with Phil Boyland and Toby Hall.
Tuesday, 6 December 2016
14:00
Huxley 340
Raj Prasad
(University of Massachussetts)
Multitowers, conjugacies and codes
Abstract:
Tuesday, 13 December 2016
11:00
Huxley 642
Mark Pollicott
(University of Warwick)
TBA
Abstract:
TBA
Tuesday, 13 December 2016
14:00
Huxley 340
Julian Newman
(University of Bielefeld)
Topological conjugacy of iterated random orientation-preserving homeomorphisms of the circle
Abstract:
Suppose we have a parameter-dependent orientation-preserving circle homeomorphism, together with a probability measure $\nu$ on the parameter space. This naturally generates a "random dynamical system" on the circle, where at each time step a parameter is randomly chosen with distribution $\nu$ (independently of all previous time steps) and the associated homeomorphism is applied. Given two parameter-dependent orientation-preserving homeomorphisms defined over the same parameter space (with the same measure), one can define a notion of "topological conjugacy" between the random dynamical systems that they generate. Under certain assumptions, we will classify such parameter-dependent homeomorphisms up to topological conjugacy.
Tuesday, 13 December 2016
15:00
Blackett 113
Tomoo Yokoyama
(Kyoto University of Education)
Topological transitivity and representability of surfaces flows
Abstract:
In this talk, we present a necessary and sufficient condition for the existence of dense orbits of continuous flows on compact connected surfaces, which is a generalization of a necessary and sufficient condition on area-preserving flows obtained by H. Marzougui and G. Soler López. We also consider what class of flows on compact surfaces can be characterized by finite labeled graphs. In particular, a class of surface flows, up to topological conjugacy, which contains both the set of Morse Smale flows and the set of area-preserving flows with finite singular points is classified by finite labeled graphs. Finally, we discuss applications to fluid dynamics.
Wednesday, 15 March 2017
14:00
Huxley 130
DynamIC Workshops and Mini-Courses
(
Complete List
)
Title
Date
Venue
Parameter Problems in Analytic Dynamics
Monday, 27 June 2016 – Friday, 1 July 2016
Imperial College London
Short-term DynamIC Visitors
(
Complete List
)
Name
Affiliation
Arrival
Departure
Host
Ricardo Perez-Marco
Institut de Mathematiques de Jussieu
Tuesday, 13 December 2016
Tuesday, 20 December 2016
Cheraghi, van Strien
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