Browsing by Subject "Abelian groups."
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On rings with distinguished ideals and their modules.
(2007-05-23)Let S be an integral domain, R an S algebra, and F a family of left ideals of R. Define End(R, F) = {φ ∈ End(R+) : φ(X ) ⊆ X for all X ∈ F }. In 1967, H. Zassenhaus proved that if R is a ring such that R+ is free of finite ...