Über einen Satz von Gabriel zur Charakterisierung regulärer Colimites.
Über einen Typ von injektiven Klassen.
Über einige Zerlegungen in einer Kategorie
Un moyen d’extension aux catégories internes dans des propriétés de la catégorie
Un théorême sur les sommes amalgamées de groupes simpliciaux.
Une autre équivalence de catégories
Une équivalence de catégories
Uniform spaces with easy behavior with respect to coreflections
Uniformly Movable Categories and Uniform Movability of Topological Spaces
A categorical generalization of the notion of movability from inverse systems and shape theory was given by the first author who defined the notion of movable category and used it to interpret the movability of topological spaces. In this paper the authors define the notion of uniformly movable category and prove that a topological space is uniformly movable in the sense of shape theory if and only if its comma category in the homotopy category HTop over the subcategory HPol of polyhedra is uniformly...
Uniformly movable compact spaces and their algebraic properties
Unions in categories and coreflective subcategories
Unital Rings whose Additive Endomorphisms Commute.
Universal concrete categories and functors
Universal properties of Span.
Universelle Koeffizientenfolgen für den lim-Funktor und Anwendungen.
Upper Central Series in a Category.