I am not sure but the result depends on the value of s and t since they are not unique in a given problemxuying1209 said:For any n,m are intergers, d_n and d_m are divisors of n and m,
respectively. If gcd(n,m)=1, gcd(i,n)=d_n , gcd(j,m)=d_m
sm=1(mod n) , tn=1(mod m),
z=smi+tnj (mod nm)
I want to know the result is true or false, and how to prove it.