Iterated commutators under a joint condition on the tuple of multiplying functions

Iterated commutators under a joint condition on the tuple of multiplying functions
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乘法函数元组联合条件下的迭代交换子

DOI:
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发表时间:
2019
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通讯作者:
Tuomas Oikari
Tuomas Oikari
中科院分区:
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作者:
T. Hytonen;Kangwei Li;Tuomas Oikari

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本文给出了算子名{BMO}中严格弱于b_1,b_2的两个函数b_1,b_2的一对联合条件,几乎刻画了这两个函数的迭代交换子[b_2,[b_1,T]]$和Calder'on-Zygmund算子T的L^2 $有界性。也就是说,我们夹在两个双次线性平均振荡条件,其中一个是一个稍微颠簸了版本的其他之间的有界性。
We present a pair of joint conditions on the two functions $b_1,b_2$ strictly weaker than $b_1,b_2in operatorname{BMO}$ that almost characterize the $L^2$ boundedness of the iterated commutator $[b_2,[b_1,T]]$ of these functions and a Calder'on-Zygmund operator $T.$ Namely, we sandwich this boundedness between two bisublinear mean oscillation conditions of which one is a slightly bumped up version of the other.