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arXiv 2109.02181math.CO
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广义Turán问题的一个非对齐变体

A non-aligning variant of generalized Turán problems

Dániel Gerbner

摘要:

在所谓的广义Turán问题中,我们研究了无$G$的$n$-顶点$F$图中$H$的最大拷贝数.这里我们引入一个变体,其中$F$不被禁止,但我们限制如何将$H$和$F$的副本放置在$G$中。更准确地说,给定一个整数$n$和图$H$和$F$,在一个$n$-顶点图中,$H$的最大副本数是多少,使得该副本的顶点集不包含并且不包含在$F$的副本的顶点集中?我们解决了这个问题的某些情况下,在其他情况下,给出了界限,我们使用我们的结果来确定一些对图的广义图兰数。

英文摘要:

In the so-called generalized Turán problems we study the largest number of copies of $H$ in an $n$-vertex $F$-free graph $G$. Here we introduce a variant, where $F$ is not forbidden, but we restrict how copies of $H$ and $F$ can be placed in $G$. More precisely, given an integer $n$ and graphs $H$ and $F$, what is the largest number of copies of $H$ in an $n$-vertex graph such that the vertex set of that copy does not contain and is not contained in the vertex set of a copy of $F$? We solve this problem for some instances, give bounds in other instances, and we use our results to determine the generalized Turán number for some pairs of graphs.

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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