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arXiv 2209.03436math.COcs.DM
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关于完全图与集合系交分离的列表着色

On List Coloring with Separation of the Complete Graph and Set System Intersections

Jean-Christophe Godin, Rémi Grisot, Olivier Togni

摘要:

我们考虑以下列表着色与分离问题:给定图$G$和整数$a,b$,找到最大整数$c$,使得对于$G$的任何列表分配$L$,对于$G$的任何顶点$v$具有$|L(v)|= a$,对于$G$的任何边$uv$具有$|L(u)\cap L(v)|\le c$,存在整数集合到$G$的顶点的分配$φ$,使得对于任何顶点$φ(u)\subset L(u)$和$φ(u)\cap φ(v)=\emptyset$适用于任何边缘$uv$。这样的$c$值称为$(G,a,b)$的分离数。使用一个特殊的划分的一组列表,我们获得了一个改进版本的庞加莱的crible,我们确定的分离数的完全图$K_n$的一些值的$a,b$和$n$,并证明了边界的其余值。

英文摘要:

We consider the following list coloring with separation problem: Given a graph $G$ and integers $a,b$, find the largest integer $c$ such that for any list assignment $L$ of $G$ with $|L(v)|= a$ for any vertex $v$ and $|L(u)\cap L(v)|\le c$ for any edge $uv$ of $G$, there exists an assignment $φ$ of sets of integers to the vertices of $G$ such that $φ(u)\subset L(u)$ and $|φ(v)|=b$ for any vertex $u$ and $φ(u)\cap φ(v)=\emptyset$ for any edge $uv$. Such a value of $c$ is called the separation number of $(G,a,b)$. Using a special partition of a set of lists for which we obtain an improved version of Poincaré's crible, we determine the separation number of the complete graph $K_n$ for some values of $a,b$ and $n$, and prove bounds for the remaining values.

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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