Frequently hypercyclic operators with irregularly visiting orbits

2017/10/22 by Grivaux, Sophie
#Dynamical Systems (math.DS) #FOS: Mathematics #Functional Analysis (math.FA)

paper · doi:10.48550/arxiv.1710.07901

Abstract

We prove that a bounded operator T on a separable Banach space X satisfying a strong form of the Frequent Hypercyclicity Criterion (which implies in particular that the operator is universal in the sense of Glasner and Weiss) admits frequently hypercyclic vectors with irregularly visiting orbits, i.e. vectors x∈ X such that the set N_T(x,U)=\n≥ 1 ; Tⁿx∈ U\ of return times of x into U under the action of T has positive lower density for every non-empty open set U⊆ X, but there exists a non-empty open set U₀⊆ X such that \ntxU₀ has no density.

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