图的1-因子计数问题是匹配理论研究中的一个重要课题,此问题有很强的物理学和化学背景.但是,一般图的1-因子计数问题却是NP-困难的.用划分,求和,再递推的方法分别给出了图2-2nC5,2-nC6和N2n的1-因子数目的计算公式.
The counting problem of 1-factor of graphs is the key task of the theoretical research for matching.It is the special background of physics and chemistry.However,the counting problem of 1-factor for general graphs is NP-which is difficult.The counting formula of the 1-factor for graphs is made by applying differentiation,summation and re-recursion in this research.