Alistair Windsor


Wellington, New Zealand
Office:
RLM 10.132
Phone:
512-471-1141
Fax:
512-471-9038
Email:
awindsor@math.utexas.edu  




Curriculum Vitae (pdf)
Research
Research Statement (pdf)
Publications
In Preparation
Teaching
Teaching Statement (pdf)

Department Colloquia
Working Dynamical Systems Seminar

RESEARCH INTERESTS:

Dynamical Systems and Ergodic Theory

Constructions in Smooth Ergodic Theory

Given a collection of dynamical properties is it possible to find a smooth map, possibly a diffeomorphism, of a compact manifold which exhibits these properties. Ideally we seek obstructions to being able to find any smooth model of a given collection of properties. For actions of Z the only known obstruction is infinite entropy.

Dynamical Cohomology

Additive cohomology classes determine the asymptotic behaviour of Birkhoff sums and are crucial in studying diverse problems including special flows and ergodic optimization. Mutiplicative cohomology classes are crucial in various problems involving skew products and special flows. Studying such equations over Anosov systems is the content of Livšic Theory.
PUBLICATIONS:

Non-Standard Smooth Realizations of Liouville Rotations
B. Fayad, M. Saprykina, A. Windsor
(PDF 200K)
accepted to Ergodic Theory and Dynamical Systems

A Dichotomy Between Discrete and Continuous Spectrum for a Class of Special Flows over Rotations
B. Fayad, A. Windsor
(PDF 220K)
accepted to the Journal of Modern Dynamics

Smoothness is not an Obstruction to Realizability
(PDF 148K)
accepted to Ergodic Theory and Dynamical Systems

A C Diffeomorphism with Infinitely Many Intermingled Basins.
I. Melbourne, A. Windsor
(PDF 152K)
accepted to Ergodic Theory and Dynamical Systems

Mixed Spectrum Reparametrizations of Linear Flows on T2
B. Fayad, A. B. Katok, A. Windsor.
(PDF 244K)
Moscow Mathematical Journal, Vol. 1, Number 4, 2001

Minimal but not Uniquely Ergodic Diffeomorphisms.
(PDF 276K)
Proceedings of Symposia in Pure Mathematics: Smooth Ergodic Theory and Its Applications
Amer. Math., Soc. Providence, RI, October 2001

IN PREPARATION:

Exotic Densities for Smooth Uniquely Ergodic Systems

Livšic Theorems for Diffeomorphism Groups
R. de la Llave, A. Windsor

A Mixing Dichotomy
I. Melbourne, A. Windsor

ECONOMICS PAPERS:

An Approximated Solution to Continuous-Time Stochastic Optimal Control Problems Through Markov Decision Chains
by J. B. Krawczyk & A. Windsor

A Matlab Package for Approximating the Solution to a Continuous- Time Stochastic Optimal Control Problem
by A. Windsor & J. B. Krawczyk

TEACHING:

Saturday Morning Math Group

I recently gave a Saturday Morning Math Group presentation entitled "Fun with Fractals". You can download the slides in PDF format. The investigation of the Mandelbrot and Julia sets used the program Fractal Domains for the Macintosh.

Close up of Mandelbrot Set

Coupled Cell Systems



This is a picture of some systems of coupled cell oscillators. Click for a PDF file of all 416 distinct networks of four identical cells with two identical inputs. A cell with less than 2 inputs is self coupled. These pictures are produced using Mathematica.

Fall 2006

I am teaching Math 408D Sequences, Series, and Multivariable Calculus and Math 361K Introduction to Real Analysis.

Math 361K will be taught using the modified Moore method. Here are the chapters from my version of the Analysis notes:
Chapter 1 (pdf), Chapter 2 (pdf), Chapter 3 (pdf), Chapter 4 (pdf).
Students may access the homework and handouts via Blackboard and grades via e-Gradebook.

Spring 2006

Math 427K Calculus for Applications 1
Two Dimensional Rotationally Symmetric Drumhead (Mathematica notebook)
Heat Equation and Wave Equation (Mathematica notebook)
Math 361K Introduction to Real Analysis

Fall 2005

Math 343K Introduction to Algebraic Structures
Math 408K Differential Calculus

Summer 2005

Math 325K Discrete Mathematics

Spring 2005

Math 427K Calculus for Applications 1
Math 365C Real Analysis 1

Fall 2004

Math 365C Real Analysis 1
Math 408L Integral Calculus