arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.03146math.CA
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有限图上极大算子的Sharp不等式

Sharp Inequalities for maximal operators on finite graphs

Cristian González-Riquelme, José Madrid

摘要:

设$G=(V,E)$是一个有限图,$M_G$是定义在图中的中心Hardy-Littlewood极大算子.我们找到最优值$\bf{C}_{G,p}$,使得不等式$$\text{Var}_{p}(M_{G}f)\leq {\textbf{C}}_{G,p}\text{Var}_{p}(f)$$对每个$f:V\to \mathbb{R},$都成立,其中$\text{Var}_p$代表$p$ -变化,当:(i)$G=K_n$(完整图)和$p\in [\frac{\log(4)}{\log(6)},\infty)$或$G=K_4$和$p\in (0,\infty)$ ;(ii)$G=S_n$(星形图)和$1\ge p\ge \frac{1}{2}$ ; $p\in (0,\frac{1}{2})$和$n\ge C(p)$或$G=S_3$和$p\in (1,\infty).$我们还找到了范数$\|M_{G}\|_{2}$的值,当:(i)$G=K_n$和$n\ge 3$ ;(ii)$G=S_n$和$n\ge 3.$

英文摘要:

Let $G=(V,E)$ be a finite graph and $M_G$ be the centered Hardy-Littlewood maximal operator defined there. We find the optimal value $\bf{C}_{G,p}$ such that the inequality $$\text{Var}_{p}(M_{G}f)\leq {\textbf{C}}_{G,p}\text{Var}_{p}(f)$$ holds for every $f:V\to \mathbb{R},$ where $\text{Var}_p$ stands for the $p$-variation, when: (i) $G=K_n$ (complete graph) and $p\in [\frac{\log(4)}{\log(6)},\infty)$ or $G=K_4$ and $p\in (0,\infty)$; (ii) $G=S_n$ (star graph) and $1\ge p\ge \frac{1}{2}$; $p\in (0,\frac{1}{2})$ and $n\ge C(p)$ or $G=S_3$ and $p\in (1,\infty).$ We also find the value of the norm $\|M_{G}\|_{2}$ when: (i) $G=K_n$ and $n\ge 3$; (ii) $G=S_n$ and $n\ge 3.$

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。

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