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arXiv 0707.4358math.PR
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Galton-Watson树边界上的精确Hausdorff测度

Exact Hausdorff measure on the boundary of a Galton--Watson tree

Toshiro Watanabe

摘要:

得到了Galton-Watson树边界上的精确Hausdorff测度几乎必然存在的一个充要条件.在几乎必然不存在绝对连续的精确Hausdorff测度的情况下,给出了一个根据边界减去某个例外集的$ϕ$ -Hausdorff测度为零或无穷大来对度规函数$ϕ$进行分类的判据.重要的例子中讨论了四个额外的定理。特别是解决了1981年的Hawkes猜想。确定分支测度在边界典型点的精确局部维数的问题也得到了解决。

英文摘要:

A necessary and sufficient condition for the almost sure existence of an absolutely continuous (with respect to the branching measure) exact Hausdorff measure on the boundary of a Galton--Watson tree is obtained. In the case where the absolutely continuous exact Hausdorff measure does not exist almost surely, a criterion which classifies gauge functions $ϕ$ according to whether $ϕ$-Hausdorff measure of the boundary minus a certain exceptional set is zero or infinity is given. Important examples are discussed in four additional theorems. In particular, Hawkes's conjecture in 1981 is solved. Problems of determining the exact local dimension of the branching measure at a typical point of the boundary are also solved.

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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