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Dynamical systems on measure spaces, invariant measures, ergodic averages, mixing properties.

5 votes
0 answers
976 views

Fibre Mixing for Dynamical Systems

Hi all, I'm interested in understanding a fairly difficult theorem of Lindenstrauss Peres and Schlag. In that paper the authors prove that certain dynamical systems related to beta expansions and Ber …
Tom Kempton's user avatar
10 votes
1 answer
1k views

Pesin Entropy Formula

In the form that I've seen it stated, the Pesin entropy formula states that if $M$ is a compact Riemannian manifold and $f$ is a $C^{1+\alpha}$ diffeomorphism of $M$ that preserves smooth invariant me …
Tom Kempton's user avatar
2 votes
1 answer
281 views

Absolutely Continuous Invariant Measures for Piecewise Convex Maps

Hi all, I'm interested in a class of 'generalised tent maps' $f:[0,1]\to[0,1]$ for which 1) $f$ is strictly increasing on $[0, \frac{1}{2}]$, $f(0)=0$ and $f(\frac{1}{2})=1$ 2) $f$ is symmetric abo …
Tom Kempton's user avatar
5 votes
0 answers
224 views

Using topological pressure to determine a subshift of finite type

I am interested in recognising graphs (or matrices, or subshifts of finite type) using topological pressure. Suppose that we play the following game: ${\bf Step 1:}$ I write down an irreducible n x n …
Tom Kempton's user avatar
3 votes
0 answers
190 views

Topological pressure for subshifts on a countable alphabet

Apologies for asking two similar questions within a week of each other, I had hoped that asking a finite alphabet version of this question would lead to enlightenment but unfortunately it didn't. Su …
Tom Kempton's user avatar
5 votes
1 answer
534 views

When is the time one map of a suspension flow ergodic?

I'm sure the answer to the following question is well known but I couldn't find the answer I needed. Let $(\Sigma,\sigma)$ denote the full shift on $k$ symbols and let $\mu$ be an invariant measure f …
Tom Kempton's user avatar
6 votes
3 answers
317 views

Approximating Subshifts From Below

I'm looking to understand how to approximate certain countable alphabet subshifts by Markov shifts, and realised that I don't know how to do it even in the finite alphabet case. My guess is that the a …
Tom Kempton's user avatar
5 votes
0 answers
141 views

Growth in families of trees

I'm hoping that the question below is simple thermodynamic formalism, but I can't quite make it work. Any help would be very welcome. Let $\Sigma:=\{0,1\}^{\mathbb N}$ and let $\Sigma^*$ be the set o …
Tom Kempton's user avatar