数学被誉为思维的体操.漫步数学海滩,真可谓奇珠异贝五光十色,令人美不胜收.现就随手拣到的珍贵贝壳——优美图奉献给数学爱好者,供赏析. 把一些数字作为一个图顶点的代码,两顶点的数字差作为相应边的标号.如果这些标号正好是从1开始的连续自然数,那么就称此图为优美图.其中任两点都有连线的优美图称完全优美图.如图1、图2. Mathematics is known as the gymnastics of thinking. Walking along the beach of mathematics can be described as an exotic and beautiful sea. The precious shells that are picked up at the moment, graceful figures, are dedicated to math lovers for appreciation. Take some figures as a The vertex code of the graph, the difference between the two vertices as the label of the corresponding edge. If these labels are exactly continuous natural numbers starting from 1, then the figure is called a graceful figure. Any two points have the graceful drawing of the connection. Elegant figure. Figure 1, Figure 2.