与（2^r,（2^r—1）!）—拉丁阵有关的矩阵的分类

The Equivalent Classes of Matrices on (2 r, (2 r -1)!) Latin Arrays

利用（２ｒ，（２ｒ－１）！）－拉丁阵（ｒ≤３）中任一列排列与行号序列可以确定一个ｒ×２ｒ矩阵Ａ。

The columns and orders of rows of a ( 2 r, (2 r-1)!) Latin array can determine a matrix. Let A be a set consisting of matrixes determined by ( 2 r, (2 r-1)!) Latin arrays. The equivalent classes of A are given. The result can be applied to cryptography.