The Taylor joint spectrum and restriction to hyperinvariant subspaces
Functional Analysis
2019-11-12 v1 Spectral Theory
Abstract
It is well known that for a single bounded operator on a Hilbert , if is hyperinvariant for , then the spectrum of is contained in the spectrum of . In this note, we modify an example of Taylor to prove the following. There exist a quadruple of commuting bounded Hilbert space operators and a hyperinvariant subspace for such that the Taylor joint spectrum of restricted to is a not a subset of the Taylor joint spectrum of .
Cite
@article{arxiv.1911.03530,
title = {The Taylor joint spectrum and restriction to hyperinvariant subspaces},
author = {Edward J. Timko},
journal= {arXiv preprint arXiv:1911.03530},
year = {2019}
}
Comments
3 pages