I know that $\langle R,+\rangle $ and $\langle\mathbb R^+,*\rangle$ are isomorphic. And Explicit map given by Exponential .
I am not able to convince myself for map $\langle \mathbb R\setminus \{0\},*\rangle $ and $\langle \mathbb R,+\rangle$ .
Any Help will be appreciated
2026-03-29 23:42:49.1774827769
Are $\langle \mathbb R,+\rangle $ and $\langle \mathbb R\setminus \{0\},*\rangle $ isomorphic?
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