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

3 votes
2 answers
238 views

Estimate entropy of a binary process in terms of decay of correlations

Suppose $( X_{n} )$ is an ergodic binary process with $$ \mathbb P(X_{n}=1)= \mathbb P(X_{n}=0)=\frac 12. $$ Naturally the entropy (rate) $h(X)$ of $X=(X_{n})$ satisfies $$ h(X)=\lim_{n\to\infty} \f …
1 vote
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functions whose average along orbits is zero or a constant

Second part: if your system is nontrivial, and function $f$ is "smooth", than condition of the form $$ \lim_{n\to\infty} \frac 1n\sum_{i=0}^{n-1} f(T^i x) =c $$ for all $\ x$, should imply that $$ f …
Allen Knutson's user avatar