arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1701.03366math.CO
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图的可加基与可加流

Additive bases and flows in graphs

Louis Esperet, Rémi de Joannis de Verclos, Tien-Nam Le, Stéphan Thomassé

摘要:

Jaeger、Linial、Payan和Tarsi在1992年证明,对于任何素数$p$,存在一个常数$c$,使得对于任何$n$,$\mathbb{Z}_p^n$的任何$c$线性基族的向量的并集(具有重复)形成$\mathbb{Z}_p^n$的加法基(即$\mathbb{Z}_p^n$的任何元素都可以表示为这些向量的子集的和)。在本文中,我们证明了这个猜想时,每个向量包含最多两个非零元素。作为应用,我们证明了关于高边连通图中流的几个结果,推广了已知的结果.例如,假设$p\ge 3$是一个素数,$\vec{G}$是一个有向的、高度边连通图,其中每个弧在$\mathbb{Z}_p$中被给予一个由两个不同值组成的列表。然后$\vec{G}$有一个$\mathbb{Z}_p$流,其中每个弧被分配一个它自己列表的值。

英文摘要:

It was conjectured by Jaeger, Linial, Payan, and Tarsi in 1992 that for any prime number $p$, there is a constant $c$ such that for any $n$, the union (with repetition) of the vectors of any family of $c$ linear bases of $\mathbb{Z}_p^n$ forms an additive basis of $\mathbb{Z}_p^n$ (i.e. any element of $\mathbb{Z}_p^n$ can be expressed as the sum of a subset of these vectors). In this note, we prove this conjecture when each vector contains at most two non-zero entries. As an application, we prove several results on flows in highly edge-connected graphs, extending known results. For instance, assume that $p\ge 3$ is a prime number and $\vec{G}$ is a directed, highly edge-connected graph in which each arc is given a list of two distinct values in $\mathbb{Z}_p$. Then $\vec{G}$ has a $\mathbb{Z}_p$-flow in which each arc is assigned a value of its own list.

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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