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北美退伍军人节(Veterans Day),12 日无更新
arXiv 2005.11790math.CA
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平面与一般集合交的豪斯多夫维数

Hausdorff dimension of intersections with planes and general sets

Pertti Mattila

摘要:

给出了正交投影的一般族$P_λ:\R^n\to\R^m, λ\in Λ,$上的条件,保证了豪斯多夫维数公式$\dim A\cap P_λ^{-1}\{u\}=s-m$对于具有正的和有限的$s$维Hausdorff测度、$s>m$和正的下密度的可测集$A\subset\Rn$一般成立.作为一个应用程序,我们证明了可测集$A,B\subset\Rn$与积极的$s$ -和$t$ -维措施,并与积极的低密度,如果$s + (n-1)t/n > n$,然后$\dim A\cap (g(B)+z) = s+t - n$几乎所有的旋转$g$和积极的许多$z\in\Rn$。

英文摘要:

We give conditions on a general family $P_λ:\R^n\to\R^m, λ\in Λ,$ of orthogonal projections which guarantee that the Hausdorff dimension formula $\dim A\cap P_λ^{-1}\{u\}=s-m$ holds generically for measurable sets $A\subset\Rn$ with positive and finite $s$-dimensional Hausdorff measure, $s>m$, and with positive lower density. As an application we prove for measurable sets $A,B\subset\Rn$ with positive $s$- and $t$-dimensional measures, and with positive lower density that if $s + (n-1)t/n > n$, then $\dim A\cap (g(B)+z) = s+t - n$ for almost all rotations $g$ and for positively many $z\in\Rn$.

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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