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Quadratic reciprocity

For distinct odd primes,

(p / q) (q / p) = (- 1)^{(p - 1) (q - 1) /4}

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Table of contents 68 2
- Quadratic character of minus three Quadratic reciprocity 62 1
  - Cube roots of minus one modulo an odd prime Quadratic character of minus three 40

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