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arXiv 1509.03072math.CO
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具有$k$边的$K_n$的禁止子图的正则图

Regular Graphs with Forbidden Subgraphs of $K_n$ with $k$ Edges

Tuvi Etzion

摘要:

在本文中,我们提出了一个变种的极值图论中的一个经典问题,这是由分数重复码的设计,在分布式存储系统中的一个模型的动机。对任意可行正整数$d\geq 3$,$n \geq 3$,$k$,其中$n-1 \leq k \leq \binom{n}{2}$,若一个$d$正则无向图的顶点数不超过$k$,则该图的最小顶点数是多少?本文的目标是给出问题的每个实例的确切顶点数,并提供$n$,$d$和$k$的一般值的一些界限。对于这个Turán型问题,给出了一些具有精确值的一般界。我们提出了一个几乎完整的解决方案,$3 \leq n \leq 5$。

英文摘要:

In this paper we raise a variant of a classic problem in extremal graph theory, which is motivated by a design of fractional repetition codes, a model in distributed storage systems. For any feasible positive integers $d\geq 3$, $n \geq 3$, and $k$, where $n-1 \leq k \leq \binom{n}{2}$, what is the minimum possible number of vertices in a $d$-regular undirected graph whose subgraphs with $n$ vertices contain at most $k$ edges? The goal of this paper is to give the exact number of vertices for each instance of the problem and also to provide some bounds for general values of $n$, $d$, and $k$. A few general bounds with some exact values, for this Turán-type problem, are given. We present an almost complete solution for $3 \leq n \leq 5$.

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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