Abstract
In this short note we prove that a group G is lcH-slender- that is, every abstract group homomorphism from a locally compact Hausdorff topological group to G has an open kernel- if and only if G is torsion-free and does not include Q or the p-adic integers Zp for any prime p. This mirrors a classical characterization given by Nunke for slender abelian groups.
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