V2EX coprime

Coprime

释义 Definition

(数论)互质的:指两个整数的最大公约数为 1(除了 1 以外没有共同因子)。也常说 relatively prime。注意:互质不表示两数都是质数。

发音 Pronunciation

/kopram/

例句 Examples

Two numbers are coprime if their greatest common divisor is 1.
如果两个数的最大公约数是 1,那么它们互质。

Although 21 and 22 are coprime, neither number is prime.
虽然 21 和 22 互质,但它们都不是质数。

词源 Etymology

coprime 由前缀 **co-**(“共同、一起”)和 prime(这里指“基本/首要的”,在数论语境下与“质数、素因子”相关)组合而成,表达“在素因子层面没有共同因素(除 1 外)”的意思。该词常用于数学与计算机科学(如模运算、RSA 等)中。

相关词 Related Words

文学作品 Literary Works

  • G. H. Hardy & E. M. Wright, An Introduction to the Theory of Numbers(经典数论教材中常用 coprime/relatively prime 讨论互质与同余)
  • Kenneth H. Rosen, Discrete Mathematics and Its Applications(离散数学教材中用于讲解最大公约数、欧几里得算法、模运算等)
  • Donald E. Knuth, The Art of Computer Programming(在算法与数论相关章节中会出现 coprime 的用法)
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