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Terme préférentiel

congruence  

Définition

  • Given an integer n > 1, called a modulus, two integers a and b are said to be congruent modulo n, if n is a divisor of their difference: that is, if there is an integer k such that:
    Congruence modulo n is a congruence relation, meaning that it is an equivalence relation that is compatible with the operations of addition, subtraction, and multiplication. Congruence modulo n is denoted:
    The parentheses mean that (mod n) applies to the entire equation, not just to the right-hand side (here, b).
    (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Modular_arithmetic#Congruence)

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http://data.loterre.fr/ark:/67375/PSR-Q3G3SRHB-H

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