real unimodular group

例句：

1. 1. The real unimodular group of a matrix is the setof all possible diagonal matrices.
   一个矩阵的实数单位群是所有可能对角矩阵的集合。
2. 2. In mathematics, the real unimodulargroup is a class of groups that areclosed under taking powers and taking inverses.
   在数学中，实数单位群是一个类群，它封闭于取幂和取逆运算。
3. 3. The realunimodular group is used in cryptography to ensure the security of data transmission.
   实数单位群在密码学中被用来确保数据传输的安全性。