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arXiv 0907.0350math.FAmath.CV
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半平面Hardy空间上的复合算子

Composition operators on Hardy spaces of a half plane

Sam Elliott, Michael T. Jury

摘要:

证明了复合算子在右半平面的Hardy空间$H^2$上有界当且仅当诱导映射非切定点于无穷远点,且在那里有有限的角导数$λ$.在这种情况下,算子的范数、本质范数和谱半径都等于$\sqrtλ$。

英文摘要:

We prove that a composition operator is bounded on the Hardy space $H^2$ of the right half-plane if and only if the inducing map fixes the point at infinity non-tangentially, and has a finite angular derivative $λ$ there. In this case the norm, essential norm, and spectral radius of the operator are all equal to $\sqrtλ$.

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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