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arXiv 1502.05490math.CA
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多线性平方函数的加权界

Weighted bounds for multilinear square functions

The Anh Bui, Mahdi Hormozi

摘要:

设$\vec{P}=(p_1,\dotsc,p_m)$与$1<p_1,\dotsc,p_m<\infty$、$1/p_1+\dotsb+1/p_m=1/p$和$\vec{w}=(w_1,\dotsc,w_m)\in A_{\vec{P}}$。本文研究了多线性平方函数$S_{α,ψ}(\vec{f})$依赖于孔径$α$的加权界。我们证明了$$ \|S_{α,ψ}(\vec{f})\|_{L^p(ν_{\vec{w}})} \leq C_{n,m,ψ,\vec{P}}~ α^{mn}[\vec{w}]_{A_{\vec{P}}}^{\max(\frac{1}{2},\tfrac{p_1'}{p},\dotsc,\tfrac{p_m'}{p})} \prod_{i=1}^m \|f_i\|_{L^{p_i}(w_i)}. $$这个结果推广了Lerner在2014年得到的线性情况下的结果。我们的证明是基于局部平均振荡技术首次提出的Calderon-Zygmund算子的加权界。这种方法有助于我们在证明主要结果时避免使用内禀平方函数。

英文摘要:

Let $\vec{P}=(p_1,\dotsc,p_m)$ with $1<p_1,\dotsc,p_m<\infty$, $1/p_1+\dotsb+1/p_m=1/p$ and $\vec{w}=(w_1,\dotsc,w_m)\in A_{\vec{P}}$. In this paper, we investigate the weighted bounds with dependence on aperture $α$ for multilinear square functions $S_{α,ψ}(\vec{f})$. We show that $$ \|S_{α,ψ}(\vec{f})\|_{L^p(ν_{\vec{w}})} \leq C_{n,m,ψ,\vec{P}}~ α^{mn}[\vec{w}]_{A_{\vec{P}}}^{\max(\frac{1}{2},\tfrac{p_1'}{p},\dotsc,\tfrac{p_m'}{p})} \prod_{i=1}^m \|f_i\|_{L^{p_i}(w_i)}. $$ This result extends the result in the linear case which was obtained by Lerner in 2014. Our proof is based on the local mean oscillation technique presented firstly to find the weighted bounds for Calderón--Zygmund operators. This method helps us avoiding intrinsic square functions in the proof of our main result.

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