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arXiv 1906.04514math.DS
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二次多项式的同时预周期整数

Simultaneously preperiodic integers for quadratic polynomials

Valentin Huguin

摘要:

本文研究了二次多项式$f_{c}(z) = z^{2} +c$的参数集$c \in \mathbb{C}$,使得两个给定的复数$a$和$b$同时是预周期的.结合复解析和算术论证,Baker和DeMarco证明了这组参数是无限的当且仅当$a^{2} = b^{2}$。最近,Buff回答了他们的一个问题,证明了$0$和$1$都是$f_{c}$的预周期的参数集$c \in \mathbb{C}$等于$\lbrace -2, -1, 0 \rbrace$。按照他的方法,我们完成了这些集的描述时,$a$和$b$是两个给定的整数与$\lvert a \rvert \neq \lvert b \rvert$。

英文摘要:

In this article, we study the set of parameters $c \in \mathbb{C}$ for which two given complex numbers $a$ and $b$ are simultaneously preperiodic for the quadratic polynomial $f_{c}(z) = z^{2} +c$. Combining complex-analytic and arithmetic arguments, Baker and DeMarco showed that this set of parameters is infinite if and only if $a^{2} = b^{2}$. Recently, Buff answered a question of theirs, proving that the set of parameters $c \in \mathbb{C}$ for which both $0$ and $1$ are preperiodic for $f_{c}$ is equal to $\lbrace -2, -1, 0 \rbrace$. Following his approach, we complete the description of these sets when $a$ and $b$ are two given integers with $\lvert a \rvert \neq \lvert b \rvert$.

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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