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arXiv 2108.05729math.FAmath.CV
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复合算子下的模型空间不变性

Model spaces invariant under composition operators

P. Muthukumar, Jaydeb Sarkar

摘要:

给定$\D$($\mathbb{C}$中的开单位圆盘)的全纯自映射$φ$,复合算子$C_φ f = f \circ φ$,$f \in H^2(\mathbb{\D})$定义了Hardy空间$H^2(\mathbb{\D})$上的有界线性算子。模型空间是$H^2(\mathbb{\D})$的后向平移不变闭子空间,它与内部函数正则相关。在本文中,我们研究的模型空间下的复合算子不变。重点放在有限维模型空间,仿射变换和线性分数变换。

英文摘要:

Given a holomorphic self-map $φ$ of $\D$ (the open unit disc in $\mathbb{C}$), the composition operator $C_φ f = f \circ φ$, $f \in H^2(\mathbb{\D})$, defines a bounded linear operator on the Hardy space $H^2(\mathbb{\D})$. The model spaces are the backward shift-invariant closed subspaces of $H^2(\mathbb{\D})$, which are canonically associated with inner functions. In this paper, we study model spaces that are invariant under composition operators. Emphasis is put on finite-dimensional model spaces, affine transformations, and linear fractional transformations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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