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.)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.