English

Dynamics of weighted backward shifts on certain analytic function spaces

Functional Analysis 2024-04-22 v3

Abstract

We introduce the Banach spaces a,bp\ell^p_{a,b} and c0,a,bc_{0,a,b}, of analytic functions on the unit disc, having normalized Schauder bases consisting of polynomials of the form fn(z)=(an+bnz)zn,  n0f_n(z)=(a_n+b_nz)z^n, ~~n\geq0, where {fn}\{f_n\} is assumed to be equivalent to the standard basis in p\ell^p and c0c_0, respectively. We study the weighted backward shift operator BwB_w on these spaces, and obtain necessary and sufficient conditions for BwB_w to be bounded, and prove that, under some mild assumptions on {an}\{a_n\} and {bn}\{b_n\}, the operator BwB_w is similar to a compact perturbation of a weighted backward shift on the sequence spaces p\ell^p or c0c_0. Further, we study the hypercyclicity, mixing, and chaos of BwB_w, and establish the existence of hypercyclic subspaces for BwB_w by computing its essential spectrum. Similar results are obtained for a function of BwB_w on a,bp\ell^p_{a,b} and c0,a,bc_{0,a,b}.

Keywords

Cite

@article{arxiv.2309.03355,
  title  = {Dynamics of weighted backward shifts on certain analytic function spaces},
  author = {Bibhash Kumar Das and Aneesh Mundayadan},
  journal= {arXiv preprint arXiv:2309.03355},
  year   = {2024}
}

Comments

Thoroughly revised, title changed

R2 v1 2026-06-28T12:14:46.426Z