[代數] Group Homomorphism
看不懂, 這邊的群Z4跟Z8都是加法,
怎麼會跑乘法出來 @.@
出處: GRE Math Subject by The Princeton Review 4th, page.242
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解答誤人啊 (汗)
φ(3) = φ(1+1+1) = φ(1)+φ(1)+φ(1) = 3φ(1)
= 3*6(mod 8) = 18(mod 8) = 2
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※ 編輯: joehuan 來自: 114.39.134.166 (10/10 10:27)