Let R be an associative ring with unit element. Mod-R and R-Mod will denote the categories
of unitary right and left R-modules, respectively, and all modules are assumed to be in Mod …

Introduction. Let R be an associative ring with unit element. Mod-jR and i^-Mod will denote
the categories of unitary right and left i£-modules, respectively, and all modules are …

抄録< jats: p> Let< jats: italic> R</jats: italic> be an associative ring with unit element. Mod-<
jats: italic> R</jats: italic> and< jats: italic> R</jats: italic>-Mod will denote the categories of …