{
  "id": "1307.0359",
  "version": "v2",
  "published": "2013-07-01T13:15:49.000Z",
  "updated": "2017-08-24T14:28:45.000Z",
  "title": "Lower Bounds for the Decay of Correlations in Non-uniformly Expanding Maps",
  "authors": [
    "Huyi Hu",
    "Sandro Vaienti"
  ],
  "comment": "43 pages, to appear on Ergodic Theory and Dynamical Systems",
  "categories": [
    "math.DS"
  ],
  "abstract": "We give conditions under which nonuniformly expanding maps exhibit lower bounds of polynomial type for the decay of correlations and for a large class of observables. We show that if the Lasota-Yorke type inequality for the transfer operator of a first return map are satisfied in a Banach space B, and the absolutely continuous invariant measure obtained is weak mixing, in terms of aperiodicity, then under some renewal condition, the maps have polynomial decay of correlations for observables in B. We also provide some general conditions that give aperiodicity for expanding maps in higher dimensional spaces. As applications, we obtain lower bounds for piecewise expanding maps with an indifferent fixed point and for which we also allow non-Markov structure and unbounded distortion. The observables are functions that have bounded variation or satisfy quasi-H\\\"older conditions and have their support bounded away from the neutral fixed points.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2013-07-01T13:15:49.000Z",
      "title": "Polynomial Decay for Non-uniformly Expanding Maps",
      "abstract": "We give conditions under which nonuniformly expanding maps have polynomial decay of correlations. We show that if the Lasota-Yorke type inequalities for the transfer operator of a first return map are satisfied in a Banach space $\\mathcal B$, and the absolutely continuous invariant measure obtained is weak mixing, in terms of aperiodicity, then under some renewal condition, the maps has polynomial decay of correlations for observables in $\\mathcal B$. We also provide some general conditions that give aperiodicity for expanding maps in higher dimensional spaces. As applications, we obtain polynomial decay, including lower bound in some cases, for piecewise expanding maps with an indifferent fixed point and for which we also allow non-markov structure and unbounded distortion. The observables are functions that have bounded variation or satisfy quasi-H\\\"older conditions respectively.",
      "comment": null,
      "journal": null,
      "doi": null
    },
    {
      "version": "v2",
      "updated": "2017-08-24T14:28:45.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "polynomial decay",
      "non-uniformly expanding maps",
      "higher dimensional spaces",
      "first return map",
      "lasota-yorke type inequalities"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 43,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2013arXiv1307.0359H"
    }
  }
}