Rainbow connection number of Cm o Pn and Cm o Cn

Let G  = ( V ( G ), E ( G )) be a nontrivial connected graph. A rainbow path is a path which is each edge colored with different color. A rainbow coloring is a coloring which any two vertices should be joined by at least one rainbow path. For two different vertices, u,v in G , a geodesic path of u-v is the shortest rainbow path of u-v . A strong rainbow coloring is a coloring which any two vertices joined by at least one rainbow geodesic. A rainbow connection number of a graph, denoted by rc ( G ), is the smallest number of color required for graph G to be said as rainbow connected. The strong rainbow color number, denoted by src ( G ), is the least number of color which is needed to color every geodesic path in the graph G to be rainbow. In this paper, we will determine  the rainbow connection and strong rainbow connection for Corona Graph Cm o Pn , and Cm o Cn .