计算机与现代化 ›› 2012, Vol. 203 ›› Issue (7): 41-43.doi: 10.3969/j.issn.1006-2475.2012.07.011

• 算法设计与分析 • 上一篇    下一篇

在Z(pk)中计算逆元的逐位消除算法

刘萍   

  1. 甘肃民族师范学院,甘肃合作747000
  • 收稿日期:2012-03-08 修回日期:1900-01-01 出版日期:2012-08-10 发布日期:2012-08-10

Iterative Elimination Algorithm on Z(pk) for Computing Inverse Elements

LIU Ping   

  1. Gansu Normal University for Nationalities, Hezuo 747000, China
  • Received:2012-03-08 Revised:1900-01-01 Online:2012-08-10 Published:2012-08-10

摘要: 讨论在模n=pk(p是素数)剩余类环R中计算逆元的算法。本文引入可逆元的阶的概念,在对阶的性质进行讨论的基础上,提出计算逆元的逐位消除算法。算法的时间复杂度为O(k2)=O((logpn)2)。

关键词: 剩余类环, 逆元, 逐位消除法

Abstract: This paper discusses the algorithm on Z(pk) for computing inverse elements, while p is a prime. The paper introduces the concept of order of reversible element and the algorithm called the iterative elimination by bit. The complexity of this algorithm is O((logpn)2).

Key words: remaider class ring, inverse element, iterative elimination by bit

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