On prime labeling of some union graphs
S. K. Patel, Jayesh Vasava · Kragujevac Journal of Mathematics · 2018
The cycle Cn is a well-known example of a prime graph and also it is quite easy to establish that the graph C (k) n which is the one point union of k copies of the cycle Cn, is a prime graph. In this paper we investigate prime labeling for graphs which are either union of C (k) n 's or union of cycle graphs.