Article
KYUNGPOOK Math. J. 2019; 59(4): 797-820
Published online December 23, 2019
Copyright © Kyungpook Mathematical Journal.
Cross-index of a Graph
Akio Kawauchi∗, Ayaka Shimizu and Yoshiro Yaguchi
Osaka City University Advanced Mathematical Institute, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
e-mail : kawauchi@sci.osaka-cu.ac.jp
Department of Mathematics, National Institute of Technology, Gunma College, 580 Toriba-cho, Maebashi-shi, Gunma 371-8530, Japan
e-mail : shimizu@nat.gunma-ct.ac.jp and yaguchi-y@nat.gunma-ct.ac.jp
Received: January 14, 2018; Revised: February 11, 2019; Accepted: February 13, 2019
For every tree
Keywords: based graph, crossing number, genus, nullity, cross-index. The fi,rst author was supported by JSPS KAKENHI Grant Number 24244005.