1. The problem statement, all variables and given/known data I need to find the congruence classes mod (3 + sqrt(-3))/2 in Q[sqrt(-3)]. 2. Relevant equations None known. 3. The attempt at a solution I'm not sure how to go about finding these congruence classes. I know that in the regular integers congruences classes mod x are just 0, 1, 2, ... x-1. Do I just try to find all of the quadratic integers with norm less than the norm of (3 + sqrt(-3))/2?