bn:01275509n
Noun Concept
EL
τετραγωνική κατάλοιπα  τετραγωνικό μη-κατάλοιπο
EN
In number theory, an integer q is called a quadratic residue modulo n if it is congruent to a perfect square modulo n; i.e., if there exists an integer x such that: x 2 ≡ q. Wikipedia
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