$K_n\square P$ is radio graceful
Keywords:
radio labeling, radio number, radio graceful, Cartesian product, $L(3, 2, 1)$-labeling, complete graph, Petersen graphAbstract
For $G$ a simple, connected graph, a vertex labeling $f:V(G)\to \Z_+$ is called a \emph{radio labeling of $G$} if it satisfies $|f(u)-f(v)|\geq\diam(G)+1-d(u,v)$ for all distinct vertices $u,v\in V(G)$. If a bijective radio labeling onto $\{1,2,\dots,|V(G)|\}$ exists, $G$ is called a \emph{radio graceful} graph. In this paper, we show $K_n\square P$ is radio graceful.Downloads
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