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arXiv 2409.09863math.NT
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Elated 数

Elated Numbers

N. Bradley Fox, Nathan H. Fox, Helen G. Grundman, Rachel Lynn, Changningphaabi Namoijam, Mary Vanderschoot

AI总结:

本研究定义了b进制下的b-elated函数与b-elated数概念,确定了该函数的不动点与循环,证明了相关序列及最小高度数的系列结果,揭示其与b-happy函数行为的显著差异。

摘要:

对于基数$b \geq 2$,$b$-elated 函数$E_{2,b}$将一个以$b$进制表示的正整数映射为其首位数字与各位数字平方和的乘积。若一个正整数在$E_{2,b}$的迭代作用下映射到1,则称其为$b$-elated 数。$b$-elated 数的高度是指将其映射到1所需的迭代次数。我们确定了$E_{2,b}$的不动点与循环,并证明了一系列关于$b$-elated 数序列以及具有最小高度的$b$-elated 数的结果。尽管$b$-elated 函数与$b$-happy 函数密切相关,但二者的行为存在显著差异,本研究的结果便证明了这一点。

英文摘要:

For a base $b \geq 2$, the $b$-elated function, $E_{2,b}$, maps a positive integer written in base $b$ to the product of its leading digit and the sum of the squares of its digits. A $b$-elated number is a positive integer that maps to $1$ under iteration of $E_{2,b}$. The height of a $b$-elated number is the number of iterations required to map it to $1$. We determine the fixed points and cycles of $E_{2,b}$ and prove a range of results concerning sequences of $b$-elated numbers and $b$-elated numbers of minimal heights. Although the $b$-elated function is closely related to the $b$-happy function, the behaviors of the two are notably different, as demonstrated by the results in this work.

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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