G.Ringelposedtheproblemtofindasufficientandnecessaryconditionforagraphtotriangulateanorientablesurface.B.MoharandC.Thoma......

G.Ringelposedtheproblemtofindasufficientandnecessaryconditionforagraphtotriangulateanorientablesurface.B.MoharandC.Thoma......

Ringel提出寻找一个图可以三角剖分给定可定向曲面的充分必要条件.针对这一问题,Mo-har和Thomassen在他们的专著《曲面上的嵌入图......