How to prove that the quotient group $\langle \mathbb{C},+\rangle/\langle \mathbb{Z},+\rangle$ isomorphic to the group $\langle \mathbb{C}^*,\cdot\rangle$ based on the first isomorphism theorem?
$\langle \mathbb{C},+\rangle/\langle \mathbb{Z},+\rangle$ isomorphic to the group $\langle \mathbb{C}^*,\cdot\rangle$
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group-theory