European Journal of Combinatorics ( IF 1 ) Pub Date : 2020-08-20 , DOI: 10.1016/j.ejc.2020.103204 Eun-Kyung Cho , Ilkyoo Choi , Boram Park
For a graph , a graph is -induced-saturated if does not contain an induced copy of , but either removing an arbitrary edge from or adding an arbitrary non-edge to creates an induced copy of . Depending on the graph , an -induced-saturated graph does not necessarily exist. In fact, (Martin and Smith, 2012) showed that -induced-saturated graphs do not exist, where denotes a path on vertices. Given that it is easy to construct -induced-saturated graphs for , (Axenovich and Csikós, 2019) asked whether such graphs exist or not for . Recently, Räty (2020) constructed a graph that is -induced-saturated. In this paper, we show that there exists a -induced-saturated graph for infinitely many values of . To be precise, for each positive integer , we construct infinitely many -induced-saturated graphs. Furthermore, we also show that the Kneser graph is -induced-saturated for every .
中文翻译:
关于路径的感应饱和
对于图 图 是 诱导饱和如果 不包含的归纳副本 ,但可以从中删除任意边 或将任意非边缘添加到 创建的归纳副本 。取决于图, 诱导饱和图不一定存在。实际上,(Martin和Smith,2012年)表明诱导饱和图不存在 表示的路径 顶点。鉴于它很容易构造引起的饱和图 ,(Axenovich andCsikós,2019)询问是否存在这样的图 。最近,Räty(2020)构造了一个图-诱导饱和。在本文中,我们表明存在一个的无穷多个数值的-诱导饱和图 。确切地说,对于每个正整数,我们构造了无限多个 诱导的饱和图。此外,我们还显示了Kneser图 是 诱导饱和 。