Compactness of composition operators on BMOA and VMOA

Compactness of composition operators on BMOA and VMOA
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DOI:
10.1007/s11425-007-0061-0
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发表时间:
2007-07
期刊:
Science in China Series A: Mathematics
影响因子:
--
通讯作者:
H. Wulan
H. Wulan
中科院分区:
其他
文献类型:
--
作者:
H. Wulan

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给出了单位圆盘上有界平均振动的所有解析函数空间BMOA上复合算子的一个新的简单紧性条件。利用我们的结果,可以直接得到BMOA上的复合算子的紧性蕴涵其在Bloch空间和哈代空间上的紧性.对VMOA也给出了类似的结果。
We give a new and simple compactness condition for composition operators on BMOA, the space of all analytic functions of the bounded mean oscillation on the unit disk. Using our results one may immediately obtain that compactness of a composition operator on BMOA implies its compactness on the Bloch space as well as on the Hardy space. Similar results on VMOA are also given.