Strict singularity of Volterra type operators on Hardy spaces
Strict singularity of Volterra type operators on Hardy spaces
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Hardy 空间上 Volterra 型算子的严格奇异性
DOI:
10.1016/j.jmaa.2020.124438
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发表时间:
2020
影响因子:
1.3
通讯作者:
Yutian Wu
中科院分区:
文献类型:
--
作者:
Qingze Lin;Junming Liu;Yutian Wu
In this paper, we first characterize the boundedness and compactness of Volterra type operator S g f (z)=∫ 0 z f′(ζ) g (ζ) d ζ, z∈ D, defined on Hardy spaces H p, 0< p<∞. The spectrum of S g is also obtained. Then we prove that S g fixes an isomorphic copy of ℓ p and an isomorphic copy of ℓ 2 if the operator S g is not compact on H p (1≤ p<∞). In particular, this implies that the strict singularity of the operator S g coincides with the compactness of the operator S g on H p. At last, we post an open question for further study.