Homomorphisms and Duality for Torsion-free Groups.
R.B., Jr. Warfield (1968)
Mathematische Zeitschrift
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R.B., Jr. Warfield (1968)
Mathematische Zeitschrift
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Stephen J. Pride (1983)
Mathematische Zeitschrift
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James Howie (1982)
Mathematische Zeitschrift
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Stéphane Fischler (2001)
Acta Arithmetica
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Manohar L. Madan (1976/77)
Mathematische Zeitschrift
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E. Cline, B. Parshall, L. Scott (1983)
Mathematische Zeitschrift
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Dion Gildenhuys, Lim Chong-Keang (1972)
Mathematische Zeitschrift
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Alfred L. Foster (1968)
Mathematische Zeitschrift
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Danchev, P.V. (2005)
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Stephen J. Pride (1973)
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Paul Hill, Charles K. Megibben (1998)
Commentationes Mathematicae Universitatis Carolinae
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It is demonstrated that an isotype subgroup of a simply presented abelian group can be simply presented without being a separable subgroup. In particular, the conjecture based on a variety of special cases that Warfield groups are absolutely separable is disproved.