English

Bounded point evaluation for operators with the wandering subspace property

Functional Analysis 2021-09-29 v2

Abstract

We extend and study the notion of bounded point evaluation introduced by Williams for a cyclic operator to the class of operators with the wandering subspace property. We characterize the set bpe(T)bpe(T) of all bounded point evaluations for an operator TT with the wandering subspace property in terms of the invertibility of certain projections. This result generalizes the earlier established characterization of bpe(T)bpe(T) for a finitely cyclic operator TT. Further, if TT is a left-invertible operator with the wandering subspace property, then we determine the bpe(T)bpe(T) and the set abpe(T)abpe(T) of all analytic bounded point evaluations for TT. We also give examples of left-invertible operator TT with the wandering subspace property for which D(0,r(T)1)abpe(T)bpe(T)\mathbb D\big(0, r(T')^{-1}\big) \subsetneqq abpe(T) \subseteq bpe(T), where r(T)r(T') is the spectral radius of the Cauchy dual TT' of TT.

Keywords

Cite

@article{arxiv.2109.10846,
  title  = {Bounded point evaluation for operators with the wandering subspace property},
  author = {Shailesh Trivedi},
  journal= {arXiv preprint arXiv:2109.10846},
  year   = {2021}
}

Comments

17 pages, new examples added

R2 v1 2026-06-24T06:13:29.619Z