Extensions of Butler groups

descriptionPublicationkeyboard_double_arrow_right Part of book or chapter of book , Other literature type 01 Jan 1983Publisher:Springer Berlin Heidelberg

Authors: Anthony Giovannitti;

doi: 10.1007/bfb0103700 , 10.1007/978-3-662-21560-9_5

Extensions of Butler groups

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Abstract

M. C. R. Butler [B] introduced a class R (called Butler groups) of torsion free Abelian groups of finite rank that is the closure of the class of subgroups of the rationals under finite direct sums, torsion free epimorphic images, and pure subgroups. (i.e., R is the smallest torsion free class that contains the rank-1 torsion free Abelian groups.)

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