English

Recurrent subspaces in Banach spaces

Functional Analysis 2024-06-11 v2 Dynamical Systems

Abstract

We study the spaceability of the set of recurrent vectors Rec(T)\text{Rec}(T) for an operator T:XXT:X\longrightarrow X on a Banach space XX. In particular: we find sufficient conditions for a quasi-rigid operator to have a recurrent subspace; when XX is a complex Banach space we show that having a recurrent subspace is equivalent to the fact that the essential spectrum of the operator intersects the closed unit disc; and we extend the previous result to the real case. As a consequence we obtain that: a weakly-mixing operator on a real or complex separable Banach space has a hypercyclic subspace if and only if it has a recurrent subspace. The results exposed exhibit a symmetry between the hypercyclic and recurrence spaceability theories showing that, at least for the spaceable property, hypercyclicity and recurrence can be treated as equals.

Keywords

Cite

@article{arxiv.2212.04464,
  title  = {Recurrent subspaces in Banach spaces},
  author = {Antoni López-Martínez},
  journal= {arXiv preprint arXiv:2212.04464},
  year   = {2024}
}

Comments

24 pages

R2 v1 2026-06-28T07:26:35.095Z