Permutation function was defined to put the vertexes in AAG in certain order according to attributes of vertexes.

根据模型面的属性集定义排序函数，将属性邻接图的顶点按照一定的序列排列。

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And it ensured the data security and integrity in the protocol entities exchange through encryption, authentication, digital signature and one-way permutation function.

并通过加密、认证、数字签名和单向置换函数有效地保证了协议中实体交互数据的安全性和完整性。

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Using gamma function, the paper popularized the common conceptions of the usual factorial, permutation and combination and proved some combination formulas in common use.

依照伽马函数，对通常的阶乘、排列、组合的概念进行了推广，并证明了一些常用的组合公式。

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