*To*: isabelle-users at cl.cam.ac.uk*Subject*: [isabelle] square root*From*: kuecuek at rbg.informatik.tu-darmstadt.de*Date*: Tue, 7 Feb 2006 11:10:04 +0000*User-agent*: KMail/1.8.3

hallo is there any proof or definition about the square roots? i want to show If p is an odd prime and a is a Quadratishe residue mod p (EX x. [x^² = a] (mod p)) then a has exactly two square roots modulo p. i have found some definition about the Quadres in Numbertheory/residues but there isn't any lemma about square roots there. thanks

**Follow-Ups**:**Re: [isabelle] square root***From:*Jeremy Avigad

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