Let G(V,E) be a simple graph and G^k be a k-power graph defined byV(G~*) = V(G), E(G^k) = E(G) ∪{uv|d(u,v) =k} for natural number k. In this paper,it is proved that P_n^3 is a graceful graph.
文摘Let G(V,E) be a simple graph and G^k be a k-power graph defined byV(G~*) = V(G), E(G^k) = E(G) ∪{uv|d(u,v) =k} for natural number k. In this paper,it is proved that P_n^3 is a graceful graph.
