On the Critical Gronp of Graph P_n×C_4
Yaoping Hou · Journal of Huaihua University · 2007
The critical group of a graph is a refinement of the number of spanning trees of the graph.It is a subtle isomorphism invariant of the graph.In this paper,the structure of the critical group of the Cartesian products graph Pn×C4 is determined and it is shown that the critical group of Pn×C4 is direct sum of two or three cyclic groups.