quadratic reciprocity

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Quadratic refers to the squaring in the question addressed.


quadratic reciprocity (uncountable)

  1. (number theory) Mathematical theorem relating the Jacobi symbol \left({a \over b}\right) to the inverted \left({b \over a}\right), essentially relating the question of whether a is a square modulo b to the opposite question of whether b is a square modulo a (or modulo the prime factors).

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