The Lower-bound Estimate of D[X_(2m)] and Fast Construction of Matrix X_(2m)  

D[X_(2m)]的下界估计与X_(2m)矩阵的快速构造

作　　者：郑玉歌[1] 李自豪[2] 

机构地区：[1]焦作工学院数学系,河南焦作454000 [2]河南省计算中心,河南郑州450000

出　　处：《Chinese Quarterly Journal of Mathematics》2000年第4期104-110,共7页数学季刊（英文版）

摘　　要：In this paper, the character matrix x n is studied, fast construction method of matrix X 2m is provided. And it is proved that the lower bound estimate of the number of an Latin squares matrix D[X m] is2m(2m)!+∑mi=2[(2m)!] 2∏ij=1K j!∏rj=1b j!.

关 键 词：symmetry Latin square matrix graph G ISOMORPHISM 

分 类 号：O157.5[理学—数学] O151.21[理学—基础数学]