Geodesic
Extremal pseudocompact Abelian groups: A unified treatment
Commentationes Mathematicae Universitatis Carolinae, Tome 54 (2013) no. 2, pp. 197-217

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The authors have shown [Proc. Amer. Math. Soc. 135 (2007), 4039--4044] that every nonmetrizable, pseudocompact abelian group has both a proper dense pseudocompact subgroup and a strictly finer pseudocompact group topology. Here they give a comprehensive, direct and self-contained proof of this result.
Classification : 22A05, 22B05
Keywords: pseudocompact topological group; extremal topological group; proper dense pseudocompact subgroup; abelian 
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     title = {Extremal pseudocompact {Abelian} groups: {A} unified treatment},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
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     zbl = {06221263},
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Comfort, W. W.; van Mill, Jan. Extremal pseudocompact Abelian groups: A unified treatment. Commentationes Mathematicae Universitatis Carolinae, Tome 54 (2013) no. 2, pp. 197-217. http://geodesic.mathdoc.fr/item/CMUC_2013__54_2_a6/