作者stylejoe (小傑)
看板Math
標題[代數]請教代數一題
時間Sat May 28 22:32:27 2011
題目:
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.
謝謝
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 58.114.210.155
1F：推 zombiea :if not, then -4 is square in Z/pZ, thus -1 do 05/29 01:50