Endpoint estimates for n-dimensional Hardy operators and their commutators

Endpoint estimates for n-dimensional Hardy operators and their commutators
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n 维 Hardy 算子及其换向器的端点估计

DOI:
10.1007/s11425-012-4465-0
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发表时间:
2011-06
期刊:
Science China Mathematics
影响因子:
--
通讯作者:
Zhao Fayou, Fu Zunwei, Lu Shanzhen
Zhao Fayou, Fu Zunwei, Lu Shanzhen
中科院分区:
其他
文献类型:
--
作者:
Zhao Fayou, Fu Zunwei, Lu Shanzhen

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本文给出了n维哈代算子弱型(1,1)不等式的一个精确界.此外,还得到了Campanato型空间上广义哈代算子的精确范数.作为应用,导出了Riemann-Liouville积分算子和n维哈代算子的相应范数.还证明了n维哈代算子从哈代空间映射到勒贝格空间。讨论了由哈代算子和(中心)BMO函数生成的交换子的端点估计.
In this paper, the sharp bound for the weak-type (1, 1) inequality for the n-dimensional Hardy operator is obtained. Moreover, the precise norms of generalized Hardy operators on the type of Campanato spaces are worked out. As applications, the corresponding norms of the Riemann-Liouville integral operator and the n-dimensional Hardy operator are deduced. It is also proved that the n-dimensional Hardy operator maps from the Hardy space into the Lebesgue space. The endpoint estimate for the commutator generated by the Hardy operator and the (central) BMO function is also discussed.
DOI: 10.1112/blms/21.1.1
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影响因子: 0.9
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