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arXiv 1504.03042math.CAmath.FA
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核与实解析函数负幂相关的奇异积分算子

Singular integral operators with kernels associated to negative powers of real-analytic functions

Michael Greenblatt

摘要:

给定一个定义在原点邻域上的实解析函数b(x),其中b(0)= 0,我们考虑具有如下核的局部卷积:|b(x)|^(-a),其中a > 0是最小数,|b(x)|^(-a)在原点的任何邻域上都不可积。在适当的一阶导数界和消去条件下,我们证明了这类算子的L^p有界性定理,包括当核不可积时。我们主要(但不完全)考虑p = 2的情况。所考虑的算子推广了里斯变换的局部形式和某些局部多参数奇异积分。推广我们的结果nonprojection-invariant版本以及奇异Radon变换版本也证明。

英文摘要:

Given a real-analytic function b(x) defined on a neighborhood of the origin with b(0) = 0, we consider local convolutions with kernels which are bounded by |b(x)|^(-a), where a > 0 is the smallest number for which |b(x)|^(-a) is not integrable on any neighborhood of the origin. Under appropriate first derivative bounds and a cancellation condition, we prove L^p boundedness theorems for such operators including when the kernel is not integrable. We primarily (but not exclusively) consider the p = 2 situation. The operators considered generalize both local versions of Riesz transforms and some local multiparameter singular integrals. Generalizations of our results to nontranslation-invariant versions as well as singular Radon transform versions are also proven.

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