English

Spectral mapping theorems for essential spectra and regularized functional calculi

Functional Analysis 2023-01-05 v2 Spectral Theory

Abstract

Gramsch and Lay [10] gave spectral mapping theorems for the Dunford-Taylor calculus of a closed linear operator TT, σ~i(f(T))=f(σ~i(T)),\widetilde{\sigma}_i(f(T)) = f(\widetilde{\sigma}_i(T)), for several extended essential spectra σ~i\widetilde{\sigma}_i. In this work, we extend such theorems for the natural functional calculus introduced by Haase [12,13]. We use the model case of bisectorial operators. The proofs presented here are generic, and are valid for similar functional calculus.

Keywords

Cite

@article{arxiv.2206.13955,
  title  = {Spectral mapping theorems for essential spectra and regularized functional calculi},
  author = {Jesús Oliva-Maza},
  journal= {arXiv preprint arXiv:2206.13955},
  year   = {2023}
}
R2 v1 2026-06-24T12:06:50.669Z