苯图上的珊瑚

The coral corresponding to a Kekuléan benzenoid

给出算法搜索任意凯库勒型苯图的根,并基于此分别给出新的充要条件判定:苯图的正规,凯库勒结构为根、芽或其它.进一步,对于任意两个凯库勒结构,给出充要条件判定其一是否可经由六角旋转转化为另一个.

An algorithm for searching the root of any Kekuléan benzenoid system is given.Based on it,some new sufficient and necessary conditions for a benzenoid system to be normal,for a Kekulé structure to be the root,bud or others of a Kekuléan benzenoid system are deduced respectively.Moreover,for any two Kekulé structures,we give a sufficient and necessary condition to determine whether one can transform into the other one.