A simple graph G is called a graceful graph if there exists a vertex-label with different integers in the set S={0, 1, 2, …, ε(G)} such that the edge-labels are defined
文摘A simple graph G is called a graceful graph if there exists a vertex-label with different integers in the set S={0, 1, 2, …, ε(G)} such that the edge-labels are defined