Is there a group epimorphism $f$ from $(\mathbb{R},+)$ to $(\mathbb{Q},+)$?
Surely $f(0)$ goes to $0$, but my problem is where to send elements of $\mathbb{R}\smallsetminus\mathbb{Q}$.
2026-04-02 15:49:19.1775144959
Group Epimorphism from $\mathbb{R}$ to $\mathbb{Q}$
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