Gracefulness of the Corona for Two Kinds of Graceful Graphs
Tang Baoxiang · Journal of Longdong University · 2008
Exactly supposing there is the public end point un+1 whose two paths are P1 and P2 for any positive integer n,among them,P1=u1u2Λunun+1,P2=un+1un+2Λu2nu2n+1.Join the vertexes ui and uj(i≠j,且i+j=2(n+1)),between P1 and P1,and the graph is made and recorded as the graph G whose corona is marked as I(G).The n-corona of the circle C4 whose length is 4 will be recorded as Gn.G,I(G)and Gn are all graceful graphs.