English

Weyl's theorem, a-Weyl's theorem, and local spectral theory

Functional Analysis 2007-05-23 v1 Spectral Theory

Abstract

We give necessary and sufficient conditions for a Banach space operator with the single valued extension property (SVEP) to satisfy Weyl's theorem and aa-Weyl's theorem. We show that if TT or TT^{\ast} has SVEP and TT is transaloid, then Weyl's theorem holds for f(T)f(T) for every fH(σ(T))f\in H(\sigma (T)). When TT^{\ast} has SVEP, TT is transaloid and TT is aa-isoloid, then aa-Weyl's theorem holds for f(T)f(T) for every fH(σ(T))f\in H(\sigma (T)). We also prove that if TT or TT^{\ast} has SVEP, then the spectral mapping theorem holds for the Weyl spectrum and for the essential approximate point spectrum.

Keywords

Cite

@article{arxiv.math/0207064,
  title  = {Weyl's theorem, a-Weyl's theorem, and local spectral theory},
  author = {Raul E. Curto and Young Min Han},
  journal= {arXiv preprint arXiv:math/0207064},
  year   = {2007}
}

Comments

23 pages

R2 v1 2026-07-22T16:46:31.999Z