文献类型：期刊文献

英文题名：Toughness and [a, b]-factors in graphs

作者：Chang, Renying[2];Zhu, Yan[1];Liu, Guizhen[3]

机构：[1]E China Univ Sci & Technol, Dept Math, Shanghai 200237, Peoples R China;[2]Linyi Univ, Sch Math, Linyi 276005, Peoples R China;[3]Shandong Univ, Sch Math, Jinan 250100, Peoples R China

年份：2012

卷号：105

起止页码：451

外文期刊名：ARS COMBINATORIA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000306871400043)】；

基金：This work is supported by NSF of Shandong Province (No. ZR2009AM013), NSFC (10871119)

语种：英文

外文关键词：[a, b]-factor; toughness; fractional factor

摘要：In this paper, we consider the relationship between toughness and the existence of [a, b]-factors. We obtain that a graph G has an [a, b]-factor if t(G) >= a - 1 + a-1/b with b > a > 1. Furthermore, it is showed that the result is best possible in some sense.