Let $G$ be a discrete, torsion and divisible group. Is $G$, $\sigma-$compact?
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Take $G$ be a torsion divisible abelian group. Let $H$ be an uncountable direct sum of $G$ with itself. Endow $H$ with discrete topology. The result is divisible torsion group which is not sigma-compact.
Moishe Kohan
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