Compact double differences of composition operators on the Bergman spaces
Compact double differences of composition operators on the Bergman spaces
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伯格曼空间上复合算子的紧致双差
DOI:
10.1016/j.jfa.2016.08.006
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发表时间:
2017-03
影响因子:
1.7
通讯作者:
Maofa Wang
中科院分区:
文献类型:
--
作者:
Boo Rim Choe;Hyungwoon Koo;Maofa Wang
As is well known on the weighted Bergman spaces over the unit disk, compactness of differences of two composition operators is characterized by certain cancellation property of the inducing maps at every “bad” boundary point, which makes each composition operator in the difference fail to be compact. Recently, the second and third authors obtained a result implying that double difference cancellation is not possible for linear combinations of three composition operators. In this paper, we obtain a complete characterization for compact double differences formed by four composition operators. Applying our characterization, we easily recover known results on linear combinations of two or three composition operators. As another application, we also show that double difference cancellation is possible for linear combinations of four composition operators by constructing an explicit example of a compact double difference formed by two noncompact differences. In spite of such an example, our characterization also shows that double difference cancellation may occur in the global sense only, and that genuine double difference cancellation is not possible in a certain local sense.
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DOI:
10.1201/9781315139920
发表时间:
1995-06
期刊:
--
影响因子:
--
作者:
Helga Barbara Isselhard Mynott
通讯作者:
Helga Barbara Isselhard Mynott
DOI:
10.1017/cbo9780511662317.013
发表时间:
1991
期刊:
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影响因子:
--
作者:
H. Hunziker;H. Jarchow;V. Mascioni
通讯作者:
H. Hunziker;H. Jarchow;V. Mascioni
影响因子:
1.3
作者:
Erno Saukko
通讯作者:
Erno Saukko
DOI:
10.1007/s11425-018-9439-2
发表时间:
2020-06
期刊:
Science China Mathematics
影响因子:
--
作者:
C. Pang;Maofa Wang
通讯作者:
C. Pang;Maofa Wang
DOI:
10.1016/j.jmaa.2015.07.027
发表时间:
2015-12-15
影响因子:
1.3
作者:
Koo, Hyungwoon;Wang, Maofa
通讯作者:
Wang, Maofa