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arXiv 1803.09705math.NTmath.COmath.GR
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$C_n^k$中的$\{1,s\}$加权达文波特常数

The $\{1,s\}$-weighted Davenport constant in $C_n^k$

Fabio Enrique Brochero Martínez, Sávio Ribas

摘要:

设$G$是有限交换群,且令$\varnothing \neq A \subset \mathbb Z$ . $G$的$A$加权达文波特常数是最小的正整数${\sf D}_A(G)$,使得$G$上的每个序列$x_1 \boldsymbol{\cdot} {\dots} \boldsymbol{\cdot} x_{{\sf D}_A(G)}$具有非空子序列$(x_{j_i})_i$,使得对于某些$\varepsilon_1, \varepsilon_2, {\dots}, \varepsilon_t \in A$,${\varepsilon_1} x_{j_1} + {\varepsilon_2} x_{j_2} + {\dots} + {\varepsilon_t} x_{j_t} = 0$。本文给出了${\sf D}_{\{1,s\}}(C_n^k)$的上界和下界,其中$C_n$表示阶为$n$,$s^2 \equiv 1 \pmod n$和$s \not\equiv \pm1 \pmod n$的循环群.这些界限在某些“小”情况下变得尖锐。

英文摘要:

Let $G$ be a finite abelian group and let $\varnothing \neq A \subset \mathbb Z$. The $A$-weighted Davenport constant of $G$ is the smallest positive integer ${\sf D}_A(G)$ such that every sequence $x_1 \boldsymbol{\cdot} {\dots} \boldsymbol{\cdot} x_{{\sf D}_A(G)}$ over $G$ has a non-empty subsequence $(x_{j_i})_i$ such that ${\varepsilon_1} x_{j_1} + {\varepsilon_2} x_{j_2} + {\dots} + {\varepsilon_t} x_{j_t} = 0$ for some $\varepsilon_1, \varepsilon_2, {\dots}, \varepsilon_t \in A$. In this paper, we obtain both upper and lower bounds for ${\sf D}_{\{1,s\}}(C_n^k)$, where $C_n$ denotes the cyclic group of order $n$, $s^2 \equiv 1 \pmod n$ and $s \not\equiv \pm1 \pmod n$. These bounds become sharp in some "small" cases.

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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