We present in this note an extension and an elementary proof of a characterization of sigma(E*, E) -sequentially precompact subsets of E*, where E is a sigma-Dedekind complete M-space with a unit.
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Mechanics, Mathematics and Management Department, Politecnico di Bari, via Amendola, 126/B, BariMechanics, Mathematics and Management Department, Politecnico di Bari, via Amendola, 126/B, Bari