Über den Homotopietyp von Linsenraumprodukten
Über den Homotopietyp zweidimensionaler CW-Komplexe und Elementartransformationen bei Darstellungen von Gruppen durch Erzeugende und definierende Relationen.
Über Konvergenz von Spektralfolgen der stabilen Homotopietheorie.
Ultrametrics and infinite dimensional whitehead theorems in shape theory.
Un diviseur de zéro induisant un élément d'homotopie central
Un groupoïde simplicial comme modèle de l'espace des chemins
Un théorême sur les sommes amalgamées de groupes simpliciaux.
Une obstruction pour scinder une équivalence d’homotopie en dimension
Une propriété homotopique des cofibrations
Une remarque sur les générateurs du cobordisme complexe.
Uniform homotopy
Uniform shape and uniform Čech homology and cohomology groups for metric spaces
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
Unitary K-Homology, SL2 and the Class Group.
Units of ring spectra and their traces in algebraic K-theory.
Universal properties and derived Kan extensions. (Propriétés universelles et extensions de Kan dérivées.)
Unstable Atomicity and Loop Spaces on Lie Groups.