关于圈并的优美性

On Gracefullness of Circles Union

研究了圈并的优美性 ,并给出了圈并优美的一个结果 :设C( 1)4k ,C( 2 )4k ,… ,C(j)4k 是j个圈 ,k是不小于 1的整数 .按顺序一个接一个的一点粘合这些圈 ,使其当 j≥ 3时 ,前一个粘合点到后一个粘合点的距离均为 2 .这样得到的图为优美图 .

Gracefullness of the circles union was studied and one result on which was given.Let C (1) 4k,C (2) 4k,…,C (j) 4k are j circles,k is a natural number.Those circles are one-point cohered by order one after another such that all the distance between the former coherence and the latter are 2,Then the obtained graph was a gracefull graph.