Connectedness of Spectra of Toeplitz Operators on Hardy Spaces with Muckenhoupt Weights Over Carleson Curves |
| |
Authors: | Alexei Yu Karlovich Ilya M Spitkovsky |
| |
Institution: | 1. Departamento de Matemática, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Quinta da Torre, 2829–516, Caparica, Portugal 2. Department of Mathematics, College of William & Mary, Williamsburg, VA, 23187-8795, U.S.A.
|
| |
Abstract: | Harold Widom proved in 1966 that the spectrum of a Toeplitz operator T(a) acting on the Hardy space
Hp(\mathbbT)H^p({\mathbb{T}}) over the unit circle
\mathbbT{\mathbb{T}} is a connected subset of the complex plane for every bounded measurable symbol a and 1 < p < ∞. In 1972, Ronald Douglas established the connectedness of the essential spectrum of T(a) on
H2(\mathbbT)H^2({\mathbb{T}}). We show that, as was suspected, these results remain valid in the setting of Hardy spaces Hp(Γ,w), 1 < p < ∞, with general Muckenhoupt weights w over arbitrary Carleson curves Γ. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|