作者stylejoe (小杰)
看板Math
标题[代数]请教代数一题
时间Sat May 28 22:32:27 2011
题目:
if p is prime and p ≡ 3 mod 4,
prove that either a^2 ≡ 2 mod p is solvable or
a^2 ≡ -2 mod p is solvable.
谢谢
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1F：推 zombiea :if not, then -4 is square in Z/pZ, thus -1 do 05/29 01:50