arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1806.06019math.CO
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图的移位反幻标号

Shifted-antimagic Labelings for Graphs

Fei-Huang Chang, Hong-Bin Chen, Wei-Tian Li, Zhishi Pan

摘要:

图的反魔标号的概念是通过从1开始的连续数来标记边,从而产生不同的顶点和。一个由来已久的猜想是,除了一条边之外,所有的连通图都是反魔图。有些图是已知的反魔图,但对稀疏图知之甚少,甚至连树也不知道。本文研究了一种称为$k$ -移位-反魔术标号的弱版本,它允许从$k+1$开始的连续数,而不是从1开始的连续数,其中$k$可以是任意整数。本文建立了文献中提出的各种概念之间的联系的反魔术标号和以前的结果在三个方面:$\bullet$一些类的图,包括树和图的顶点是奇数度,这还没有被证明是反魔术的被证明是$k$ -移位-反魔术充分大的$k$。$\bullet$有些图对所有的$k$被证明是$k$ -移位-反幻的,而有些图对某些特殊的$k$则不是. $\bullet$不连通图也被考虑。

英文摘要:

The concept of antimagic labelings of a graph is to produce distinct vertex sums by labeling edges through consecutive numbers starting from one. A long-standing conjecture is that every connected graph, except a single edge, is antimagic. Some graphs are known to be antimagic, but little has been known about sparse graphs, not even trees. This paper studies a weak version called $k$-shifted-antimagic labelings which allow the consecutive numbers starting from $k+1$, instead of starting from 1, where $k$ can be any integer. This paper establishes connections among various concepts proposed in the literature of antimagic labelings and extends previous results in three aspects: $\bullet$ Some classes of graphs, including trees and graphs whose vertices are of odd degrees, which have not been verified to be antimagic are shown to be $k$-shifted-antimagic for sufficiently large $k$. $\bullet$ Some graphs are proved $k$-shifted-antimagic for all $k$, while some are proved not for some particular $k$. $\bullet$ Disconnected graphs are also considered.

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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