K_7-Minors in optimal 1-planar graphs
K_7-Minors in optimal 1-planar graphs
复制标题
最优 1 平面图中的 K_7-Minors
DOI:
10.1016/j.disc.2017.01.022
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发表时间:
2017
影响因子:
0.8
通讯作者:
Yusuke Suzuki
中科院分区:
文献类型:
--
作者:
Nishina Makoto;Suzuki Yusuke;鈴木信行;鈴木信行;Yusuke Suzuki
We discuss the existence of minors of given graphs in optimal 1-planar graphs. As our first main result, we prove that for any graph H, there exists an optimal 1-planar graph which contains H as a topological minor. Next, we consider minors of complete graphs. It is easily obtained from Mader’s result (Mader, 1968) that every optimal 1-planar graph has a K 6-minor. In the paper, we characterize optimal 1-planar graphs having no K 7-minor.