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arXiv 2104.14935math.COcs.DM
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t-完全图的补

Complementation in t-perfect graphs

Yixin Cao, Shenghua Wang

摘要:

受完美图在组合优化中应用的启发,Chvátal在20世纪70年代定义了t-完美图。刻画t-完美图的长期努力立即开始,但令人遗憾的是,即使是一个工作猜想,它仍然失踪了近50年。与完美图不同,t-完美图在替换或补下不是封闭的。Benchetrit在他的博士论文中得到了关于替换的t-完全性的充分刻画。论文通过目前的工作,我们试图了解t-完善方面的补充。特别是,我们证明了只有五对图,使图和他们的补充是最小的t-不完美。

英文摘要:

Inspired by applications of perfect graphs in combinatorial optimization, Chvátal defined t-perfect graphs in 1970s. The long efforts of characterizing t-perfect graphs started immediately, but embarrassingly, even a working conjecture on it is still missing after nearly 50 years. Unlike perfect graphs, t-perfect graphs are not closed under substitution or complementation. A full characterization of t-perfection with respect to substitution has been obtained by Benchetrit in his Ph.D. thesis. Through the present work we attempt to understand t-perfection with respect to complementation. In particular, we show that there are only five pairs of graphs such that both the graphs and their complements are minimally t-imperfect.

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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