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http://dx.doi.org/10.11568/kjm.2014.22.3.501

ON ALMOST ω1-pω+n-PROJECTIVE ABELIAN p-GROUPS  

Danchev, Peter V. (Department of Mathematics Plovdiv State University "P. Hilendarski")
Publication Information
Korean Journal of Mathematics / v.22, no.3, 2014 , pp. 501-516 More about this Journal
Abstract
We define the class of almost ${\omega}_1-p^{\omega+n}$-projective abelian p-primary groups and investigate their basic properties. The established results extend classical achievements due to Hill (Comment. Math. Univ. Carol., 1995), Hill-Ullery (Czech. Math. J., 1996) and Keef (J. Alg. Numb. Th. Acad., 2010).
Keywords
abelian groups; almost ${\Sigma}$-cyclic groups; almost ${\omega}_1-p^{\omega+n}$-projective groups; nice subgroups;
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