Keke WangRongxia HaoJianbing Liu
In 1950s, Tutte introduced the theory of nowhere-zero flows as a tool to investigate the coloring problem of maps, together with his most fascinating conjectures on nowhere-zero flows. These have been extended by Jaeger, Linial, Payan and Tarsil in 1992 to group connectivity, the generalized form of nowhere-zero flows.
Keke WangRongxia HaoJianbing Liu
Xiumei WangJinjiang YuanSujing Zhou
Qiao ChengQin WangDing Zhe-Heng