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math.GR2021
Perfect monoids with zero and categories of -acts
Josef Dvořák, Jan Žemlička
In this paper, we study the relationship between the two main categories of -acts for a monoid with zero from the viewpoint of existence of projective covers and the equival…
math.GR2021
Self-small products of abelian groups
Josef Dvořák, Jan Žemlička
For abelian groups , is called -small if the covariant functor commutes with all direct sums and is self-small provided it is -small. The p…
math.CT2021★ 2 cited
Autocompact objects of Ab5 categories
Josef Dvořák, Jan Žemlička
The aim of the paper is to describe autocompact objects in Ab5-categories, i.e. objects in cocomplete abelian categories with exactness preserving filtered colimits of exact sequen…