Several characterizations of SSDR-maps
Simplicial approximation.
Simplicial chains over a field and p-local homotopy theory.
Simplicial Sets from Categories.
Simplicial torsors.
Some examples of nontrivial homotopy groups of modules.
Some results on homotopy theory of modules
Seguendo le idee presentate nei lavori [1] e [2] si studiano le proprietà dei gruppi di -omotopia per moduli ed omomorfismi di moduli.
Stratified model categories
The fourth axiom of a model category states that given a commutative square of maps, say i: A → B, g: B → Y, f: A → X, and p: X → Y such that gi = pf, if i is a cofibration, p a fibration and either i or p is a weak equivalence, then a lifting (i.e. a map h: B → X such that ph = g and hi = f) exists. We show that for many model categories the two conditions that either i or p above is a weak equivalence can be embedded in an infinite number of conditions which imply the existence of a lifting (roughly,...
Subdivisiones Relativas Sobre Pre-Haces Y Homologias Simpliciales Isomorfas.
Sur la notion de diagramme homotopiquement cohérent
Sur le type d'homotopie d'un CW-complexe.
Survey of Oka theory.