F. Yang Research is partially supported by NSF-China Grant: NSFC 11326215 and NSFC 11371009. Research is partially supported by Natural Science Foundation of Jiangsu Province of China: BK20130472. X. Li Research is partially supported by NSF-China Grant: NSFC: 11171129 and by Doctoral Fund of Ministry of Education of China (20130144110001). L. Li Research is partially supported by NSF-China Grant: NSFC: 11301254.
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本校为其他机构
院系归属：
数学与统计学学院
摘要：
Let be a 3-edge-connected graph on vertices. It is proved in this paper that if , then either can be -contracted to one of graphs or is one of the graphs ...
