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arXiv 1003.5174math.DS
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指数族中豪斯多夫维数的变化

Variations of Hausdorff Dimension in the Exponential Family

Guillaume Havard, Mariusz Urbanski, Michel Zinsmeister

摘要:

本文研究了指数映射族$(f_λ:z\mapsto λ(e^z-1))_{λ\in [1,+\infty)}$。表示$d(λ)$为$f_λ$的双曲维数。已知函数$λ\mapsto d(λ)$在$(1,+\infty)$中是实解析的,并且在$[1,+\infty)$中是连续的。本文证明了这类映射是$[1,+\infty)$上的C-$^1$,有$d'(1^+)=0$ .此外,根据值的$d(1)$,我们给的速度收敛到0的估计。

英文摘要:

In this paper we deal with the following family of exponential maps $(f_λ:z\mapsto λ(e^z-1))_{λ\in [1,+\infty)}$. Denoting $d(λ)$ the hyperbolic dimension of $f_λ$. It is known that the function $λ\mapsto d(λ)$ is real analytic in $(1,+\infty)$, and that it is continuous in $[1,+\infty)$. In this paper we prove that this map is C$^1$ on $[1,+\infty)$, with $d'(1^+)=0$. Moreover, depending on the value of $d(1)$, we give estimates of the speed of convergence towards 0.

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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