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The existence of Galois sets

G. Szeto, Yuen-Fat Wong (1987)

Matematički Vesnik

The global homological dimension of semi-trival extensions of rings.

Ingegerd Palmér (1975)

Mathematica Scandinavica

The hulls of semiprime rings

Paul F. Conrad (1978)

Czechoslovak Mathematical Journal

The importance of rational extensions

Frans Loonstra (1988)

Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni

The rational completion $\bar{M}$ of an $R$ -module $M$ can be characterized as a $\tau_{M}$ -injective hull of $M$ with respect to a (hereditary) torsion functor $\tau_{M}$ depending on $M$ . Properties of a torsion functor depending on an $R$ -module $M$ are studied.

Two-sided essential nilpotence.

Eslami, Esfandiar, Stewart, Patrick (1992)

International Journal of Mathematics and Mathematical Sciences