arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0906.1941math.CA
收藏

Haar移位算子的Sharp $ A_2$不等式

Sharp $ A_2$ Inequality for Haar Shift Operators

Michael T. Lacey, Stefanie Petermichl, Maria Carmen Reguera

摘要:

作为我们主要定理的推论,我们给出了L^2(w)上希尔伯特变换的范数有界于一个权的一次幂的A_2特征的一个新的证明,这是我们的一个定理。这个新的证明开始于先前的证明,通过传递到哈尔移位。然后,我们应用Nazarov-Treil-Volberg的一个深双权T1定理,将问题归结为检验某个Carleson测度条件。通过重量的电晕分解检查这种情况。这种类型的先前证明使用贝尔曼函数,而这种证明足够灵活,可以同时解决所有Haar移位。

英文摘要:

As a corollary to our main theorem we give a new proof of the result that the norm of the Hilbert transform on L^2(w) has norm bounded by a the A_2 characteristic of a weight to the first power, a theorem of one of us. This new proof begins as the prior proofs do, by passing to Haar shifts. Then, we apply a deep two-weight T1 theorem of Nazarov-Treil-Volberg, to reduce the matter to checking a certain carleson measure condition. This condition is checked with a corona decomposition of the weight. Prior proofs of this type have used Bellman functions, while this proof is flexible enough to address all Haar shifts at the same time.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑