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arXiv 0908.1405math.FAmath.SP
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某些复合算子的谱及相应的加权复合算子

Spectra of some composition operators and associated weighted composition operators

Paul S. Bourdon

摘要:

刻画了作用在开单位圆盘U的Hardy空间H-2上的“本质线性分式”复合算子的谱和本质谱。当这些复合算子的符号在单位圆上具有Denjoy-Wolff点时,谱与本质谱重合。我们的工作使我们能够描述谱和本质谱的某些相关的加权复合算子的Hardy空间。

英文摘要:

We characterize the spectrum and essential spectrum of "essentially linear fractional" composition operators acting on the Hardy space H-two of the open unit disc U. When the symbols of these composition operators have Denjoy-Wolff point on the unit circle, the spectrum and essential spectrum coincide. Our work permits us to describe the spectrum and essential spectrum of certain associated weighted composition operators on the Hardy space.

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