摘要
在置换合痕的基础上 ,提出拉丁方合痕不变量—特征数的概念 ,进而提出一种判别拉丁方合痕代表元的算法—特征数法 ,同时提出局部合痕的概念 。
On the basis of permutation, the concept of feature number, which is a fixed quantity of Latin square isotopy, is given. An algorithm called feature number algorithm is also presented to decide whether a Latin square is an Isotopy representative or not. Another concept of Local Isotopy is given which speeds the feature number algorithm. The results of 4~8 order Latin square, especially, 1676276 representatives of 8 order are obtained.
出处
《华中理工大学学报》
CSCD
北大核心
2000年第1期96-99,共4页
Journal of Huazhong University of Science and Technology
基金
国家自然科学基金资助项目! ( 66973 0 3 4 )
关键词
拉丁方
置换
合痕类
特征数
局部合痕
代表元
Latin square
permutation
normal
isotopy
feature number
local isotopy
