Re: [問題] 請問明天密碼學
我今天剛好讀到這裡
來回答一下
※ 引述《ofz (╴△╴)》之銘言：
: 聽老師說要小考
: 考代數p.22頁的問題 跟不知哪部分(慢來沒聽到)
: p.22頁應該是 if f(1)=5 is isomorphism
f(0) = 1, f(1) = 5, f(2) = 4, f(3) = 6, f(4) = 2, f(5) = 3
=> isomorphism
: f(n)=5^n mod7 吧
: if f(1)=2 is not
f(0) = 1, f(1) = 2, f(2) = 4, f(3) = 1, f(4) = 2, f(5) = 4
=> not one-to-one, not onto => not isomorphism
所以都沒錯
: 可以告訴我另一部分嗎? 囧> 感謝
另一題是p.7五個證明挑一個考
答案在Wikipedia
http://en.wikipedia.org/wiki/Elementary_group_theory#Basic_theorems
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