加权Hardy空间上一些复合算子的扩展谱

IF 0.6 4区 数学 Q3 MATHEMATICS
I. F. Z. Bensaid, F. León-Saavedra, P. Romero de la Rosa
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引用次数: 0

摘要

设\(\alpha\)是一个复标量,设\(A\)是希尔伯特空间\(H\)上的一个有界线性算子。我们说\(\alpha\)是\(A\)的扩展特征值,如果存在一个非零有界线性算子\(X\)使得\(AX=\alpha XA\)。在自同构的加权Hardy空间不变条件下,我们完整地计算了单位盘\(\mathbb{D}\)的线性分数自映射所导出的复合算子的扩展特征值,其中\(\mathbb{D}\)内有一个不动点,\(\overline{\mathbb{D}}\)外有一个不动点。这类变换包括椭圆和直线映射以及双曲非自同构映射。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Extended Spectra for Some Composition Operators on Weighted Hardy Spaces

Let \(\alpha\) be a complex scalar, and let \(A\) be a bounded linear operator on a Hilbert space \(H\). We say that \(\alpha\) is an extended eigenvalue of \(A\) if there exists a nonzero bounded linear operator \(X\) such that \(AX=\alpha XA\). In weighted Hardy spaces invariant under automorphisms, we completely compute the extended eigenvalues of composition operators induced by linear fractional self-mappings of the unit disk \(\mathbb{D}\) with one fixed point in \(\mathbb{D}\) and one outside \(\overline{\mathbb{D}}\). Such classes of transformations include elliptic and loxodromic mappings as well as a hyperbolic nonautomorphic mapping.

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来源期刊
CiteScore
0.90
自引率
0.00%
发文量
7
审稿时长
>12 weeks
期刊介绍: Functional Analysis and Its Applications publishes current problems of functional analysis, including representation theory, theory of abstract and functional spaces, theory of operators, spectral theory, theory of operator equations, and the theory of normed rings. The journal also covers the most important applications of functional analysis in mathematics, mechanics, and theoretical physics.
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