搜索结果: 1-2 共查到“图论 Apex graphs”相关记录2条 . 查询时间(0.046 秒)
We provide a short proof that a 5-connected nonplanar apex graph contains a subdivided K5 or a K−4 (= K4 with a single edge removed) as a subgraph. Together with a recent result of Ma and Yu tha...
The Kelmans-Seymour conjecture states that the 5-connected nonplanar graphs contain a subdivided K5 .