KnowraQuadratic residueLinked fromLinked fromThe 12 pages that link to Quadratic residue, each with the reason it gives.All 12Broader topic 2Related 4Narrower topic 6Disquisitiones ArithmeticaeBroader topic: Quadratic residues are the subject of the book’s landmark reciprocity theorem.Schinzel's theoremBroader topic: For an irreducible quadratic, a root modulo a prime means its discriminant is a quadratic residue there.