阿摩線上測驗
題組內容
8. Let p and a be two distinct prime numbers and n = p*q be the product of p and q. For any
u1, u2 in 
, and any v1, v2 in 
,, define (u1, v1)* (u2, v2) = (u1* u2 mod p, V1* v2 mod q).
, and any v1, v2 in ,, define (u1, v1)* (u2, v2) = (u1* u2 mod p, V1* v2 mod q).
) is a commutative group.