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- W2022202051 abstract "Abstract We call an S -module M self-free with basis X if X is a subset of M and each function f : X → M extends to a unique endomorphism ϕ : M → M. Such structures were called minimally ∣X∣-free in Bankston and Schutt (Bankston P., Schutt, R. (1995). On minimally free algebras Can. J. Math. 37(5) : 963–978.). If |X|= 1, then M is an E-module over S. We show that if M is slender, then M is a direct sum of |X| many copies of an E-module, without restrictions on the cardinality of X. We also investigate additive groups of torsion-free rings of finite rank without zero-divisors. We find criteria under which these rings are E-rings. Also, we find conditions for abelian groups to be E-groups." @default.
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- W2022202051 date "2003-01-05" @default.
- W2022202051 modified "2023-10-16" @default.
- W2022202051 title "Self-Free Modules and E-Rings" @default.
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- W2022202051 doi "https://doi.org/10.1081/agb-120017772" @default.
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