We have \( Z[i] = \{ a + bi \mid a, b \in Z \} \), which is the set of Gaussian integers, and \( Q[i] = \{ r + si \mid r, s \in Q \} \), which is the set of Gaussian rationals. We want to show that the field of quotients of \( Z[i] \) is ring-isomorphic to \( Q[i]
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