On the intersection of two longest paths in $k$-connected graphs
arXiv (Cornell University)(2020)
摘要
We show that every pair of longest paths in a $k$-connected graph on $n$ vertices intersect each other in at least $(8k-n+2)/5$ vertices. We also show that, in a 4-connected graph, every pair of longest paths intersect each other in at least four vertices. This confirms a conjecture of Hippchen for $k$-connected graphs when $k\leq 4$ or $k\geq (n-2)/3$.
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关键词
longest paths,graphs,intersection
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