Examples of diffeomorphism group cocycles with no periodic approximation
Dynamical Systems
2017-05-23 v2
Abstract
We construct a finitely generated subgroup of where every element is conjugate to an isometry but such that the group action itself is far from isometric (the group has "exponential growth of derivatives"). As a corollary, one obtains a locally constant valued cocycle over a hyperbolic dynamical system which has elliptic behavior over its periodic orbits but which preserves a measure with non-zero top Fiber Lyapunov exponent. Additionally, we provide new examples of Banach cocycles not satisfying the periodic approximation property as first shown by Kalinin-Sadovskaya.
Cite
@article{arxiv.1705.06361,
title = {Examples of diffeomorphism group cocycles with no periodic approximation},
author = {Sebastian Hurtado},
journal= {arXiv preprint arXiv:1705.06361},
year = {2017}
}