The group of homomorphisms of Abelian torsion groups.
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Legg, M.W. (1979)
International Journal of Mathematics and Mathematical Sciences
H. W. K. Angad-Gaur (1977)
Rendiconti del Seminario Matematico della Università di Padova
Tsarev, A.V. (2005)
Sibirskij Matematicheskij Zhurnal
A. Mekler, G. Schlitt (1994)
Fundamenta Mathematicae
We study the -theory of sequences of dual groups and give a complete classification of the -elementary classes by finding simple invariants for them. We show that nonstandard models exist.
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