一类极大平面图及其冠的优美性

A Type of Maximal Planar Graph and the Gracefulness of Its Corona

对每个正整数p(p≥3),都存在一个p阶极大平面图Gp,使得Gp和它的冠I(Gp)都是优美图.

There must be a maximal planar graph GP of a step P for each normal integer P (P≥3). Therefore,Gp and its corona are made into the graceful graphs.