131 citations · 953 across the 64 of their papers we have counts for
4 papers · 1 filter
Flat ring epimorphisms of countable type
Leonid Positselski
Let be an associative ring epimorphism such that is a flat left -module. Assume that the related Gabriel topology of right ideals in has a countable…
Contramodules over pro-perfect topological rings
Leonid Positselski
For four wide classes of topological rings , we show that all flat left -contramodules have projective covers if and only if all flat left -c…
Exactness of direct limits for abelian categories with an injective cogenerator
Leonid Positselski, Jan Stovicek
We prove that the exactness of direct limits in an abelian category with products and an injective cogenerator J is equivalent to a condition on J which is well-known to characteri…
-almost perfect commutative rings
Silvana Bazzoni, Leonid Positselski
Given a multiplicative subset in a commutative ring , we consider -weakly cotorsion and -strongly flat -modules, and show that all -modules have -strongly fla…