Gross,Klein和Rieper(1993)计算了项链图的亏格分布,其后,Chen,Liu和Wang(2006)以及Yang,Liu(2007)分别给出了项链图嵌入分布的递推式和显式.本文给出项链图嵌入分布的多项式显式.从计数角度,此式比上述两个表达式更为简洁.
Gross,Klein and Rieper(1993) obtained the genus distri- butions of necklaces. Chen,Liu and Wang(2006),and Yang,Liu(2007),calculated total embedding distributions of necklaces,they obtained recurrence relations and ex- plicit formula, respectively.In this paper,we get a simpler explicit formula for the total embedding distributions of necklaces.