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arXiv 1610.08151math.PR
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Galton-Watson树上有偏随机游动速度的单调性

Monotonicity of the speed for biased random walk on Galton-Watson tree

Song He, Wang Longmin, Xiang Kainan

摘要:

Ben Arous,Fribergh和Sidoravicius \cite{GAV2014}证明了无叶Galton-Watson树上有偏随机游动$RW_λ$的速度对于$λ\leq \frac{m_1}{1160},$是严格递减的,其中$m_1$是Galton-Watson树的最小度。在本文中,我们证明了在没有叶子的Galton-Watson树上的$λ\leq \frac{1}{2}.$,当$m_1\geq 2;$时,它的速度对于$λ\in \left[0,\frac{m_1}{1+\sqrt{1-\frac{1}{m_1}}}\right]$是严格递减的,这一证明归功于A \cite{EA2013} .

英文摘要:

Ben Arous, Fribergh and Sidoravicius \cite{GAV2014} proved that speed of biased random walk $RW_λ$ on a Galton-Watson tree without leaves is strictly decreasing for $λ\leq \frac{m_1}{1160},$ where $m_1$ is minimal degree of the Galton-Watson tree. And A\"ıdékon \cite{EA2013} improved this result to $λ\leq \frac{1}{2}.$ In this paper, we prove that for the $RW_λ$ on a Galton-Watson tree without leaves, its speed is strictly decreasing for $λ\in \left[0,\frac{m_1}{1+\sqrt{1-\frac{1}{m_1}}}\right]$ when $m_1\geq 2;$ and we owe the proof to A\"ıdékon \cite{EA2013}.

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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