Math 7394
Ergodic theory and
thermodynamic formalism
Spring 2019
Instructor: Vaughn
Climenhaga
- Office: 665 PGH
- Office hours: Monday and Wednesday
2-2:50pm
- Email: climenha [at] math.uh.edu
Course information:
- Lectures: MWF, 11am-12pm, AH 2
- Textbook: An Introduction to
Ergodic Theory, by Peter Walters
- Supplementary references:
- Equilibrium States and the Ergodic Theory
of Anosov Diffeomorphisms, by Rufus Bowen
- Other research and survey papers and
supplementary notes to be posted and
distributed
- Syllabus
Ergodic theory is a central part of the theory of
dynamical systems, studying the asymptotic
statistical properties of systems evolving in time
that preserve an invariant measure. Systems
with chaotic behavior generally possess many
invariant measures, and thermodynamic formalism
borrows tools from statistical mechanics to select
a distinguished measure that is physically
relevant. The first part of the class will
cover topics in classical ergodic theory,
including Birkhoff's ergodic theorem, entropy, and
the classification of Bernoulli
automorphisms.
The remainder of the course will discuss
thermodynamic formalism, including the description
of Sinai-Ruelle-Bowen measure via absolute
continuity, the description of Parry measure via a
variational principle, and the connection between
the two via the general theory of equilibrium
states. Some time will be spent describing
the different approaches to thermodynamic
formalism and SRB measures in uniform
hyperbolicity: Ruelle-Perron-Frobenius operators
indirectly via symbolic dynamics or directly via
anisotropic Banach spaces; specification and
expansivity; and the geometric approach via
averaged pushforwards. Time permitting, we
will discuss connections to dimension theory and
geometric measure theory, and will conclude with a
discussion of the nonuniformly hyperbolic setting.
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