{ "id": "1808.07131", "version": "v1", "published": "2018-08-21T21:14:16.000Z", "updated": "2018-08-21T21:14:16.000Z", "title": "Unstable Entropy of Partially Hyperbolic Diffeomorphisms and Generic Points of Ergodic Measures", "authors": [ "Gabriel Ponce" ], "categories": [ "math.DS" ], "abstract": "Given a partially hyperbolic diffeomorphism $f:M \\rightarrow M$ defined on a compact Riemannian manifold $M$, in this paper we define the concept of unstable topological entropy of $f$ on a set $Y \\subset M$ not necessarily compact and we extend a theorem of R. Bowen proving that, for an ergodic $f$-invariant measure $\\mu$, the unstable measure theoretical entropy of $f$ is upper bounded by the unstable topological entropy of $f$ on any set of full $\\mu$-measure. We also define a notion of unstable topological entropy of $f$ using a Hausdorff dimension like characterization and we show that the unstable topological entropy of the set of generic points of an ergodic invariant measure $\\mu$ is equal to the unstable metric entropy with respect to $\\mu$.", "revisions": [ { "version": "v1", "updated": "2018-08-21T21:14:16.000Z" } ], "analyses": { "keywords": [ "partially hyperbolic diffeomorphism", "unstable topological entropy", "generic points", "ergodic measures", "unstable entropy" ], "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable" } } }