Given a non-trivial subgroup $G\subset\mathbb R$ (with respect to +) such that $\inf(\mathbb R_+^\times\cap G)=d>0$, I need to show that $G=\mathbb Zd$.
What is $\inf(\mathbb R_+^\times\cap G)$?
2026-04-07 21:46:12.1775598372
What is $\inf(\mathbb R_+^\times\cap G)$?
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