The structure of Ext(A,Z) and GCH: possible co-Moore spaces

2003/03/27 by Paul C. Eklof, Saharon Shelah
Mathematics · #math.LO #math.GR

paper · pdf

published as Mathematische Zeitschrift, 239 (2002), 143-157

arxiv created 2003/03/27 · arxiv updated 2009/11/30

Abstract

We consider what Ext(A,Z) can be when A is torsion-free and Hom(A,Z)=0. We thereby give an answer to a question of Golasinski and Goncalves which asks for the divisible Abelian groups which can be the type of a co-Moore space.

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