arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1906.06157cs.DMmath.CO
收藏

洋葱德布鲁因序列:通过扩展字母表进行固定窗口计数

Onion De Bruijn Sequences: Fixed-Window Counting by Growing the Alphabet

The Stein Faculty of Computer and Information Science Ben-Gurion University of the Negev(内盖夫本-古里安大学斯坦计算机与信息科学学院)

Dor Genosar, Yotam Svoray, Gera Weiss

AI总结:

本文研究了一种固定窗口计数系统,通过扩展字母表实现整数的固定长度表示,提出洋葱德布鲁因序列概念,证明其结构特性,并通过显式乘积公式计算兼容的有限前缀。

摘要:

本文研究了一种固定窗口计数系统,整数通过固定长度的词表示,字母表根据需要扩展。这一观点源于德布鲁因序列:对于固定顺序n,反向偏好最大序列与字母表扩展兼容,因为对于每个k,其在[k]^n上的限制是一个德布鲁因序列,从而产生一个无限序列 over N。我们通过洋葱德布鲁因序列的概念正式化这一观点,证明由此产生的结构特性,并通过显式乘积公式计算兼容的有限前缀。对于顺序n=2,3,我们给出显式排名和解码公式,并描述通过有限规范化进行的加法和乘法,具有精确的进位计数和输入层线性进位复杂度。

英文摘要:

We study a fixed-window counting system in which integers are represented by words of constant length while the alphabet grows as needed. This viewpoint arises from De Bruijn sequences: for fixed order $n$, the reverse prefer-max sequence is compatible with alphabet growth, since for each $k$ its restriction to $[k]^n$ is a De Bruijn sequence, yielding an infinite sequence over $\mathbb{N}$. We formalize this through the notion of an onion De Bruijn sequence, prove the resulting structural properties, and count compatible finite onion prefixes by an explicit product formula. For orders $n=2,3$, we give explicit rank and unrank formulas and describe addition and multiplication via finite normalization, with exact carry counts and linear carry complexity in the input layers.

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。

↑