In order to solve the problem of complete system of orthogonalLatinsquares, relation between Latin square and permutation groups is discussed by using method of algebra.
为了解决正交拉丁方完备组问题,利用代数方法讨论了拉丁方与正则群的关系。
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Since then, other weaker versions such as "near orthogonal", "incomplete orthogonal", "perpendicular" Latinsquares were investigated by many authors.