Deligne-Beilinson cohomology and abelian link invariants.
Deloopings of the spaces of long embeddings
The homotopy fiber of the inclusion from the long embedding space to the long immersion space is known to be an iterated based loop space (if the codimension is greater than two). In this paper we deloop the homotopy fiber to obtain the topological Stiefel manifold, combining results of Lashof and of Lees. We also give a delooping of the long embedding space, which can be regarded as a version of Morlet-Burghelea-Lashof's delooping of the diffeomorphism group of the disk relative to the boundary....
Delta link-homotopy on spatial graphs.
We study new equivalence relations in spatial graph theory. We consider natural generalizations of delta link-homotopy on links, which is an equivalence relation generated by delta moves on the same component and ambient isotopies. They are stronger than edge-homotopy and vertex-homotopy on spatial graphs which are natural generalizations of link-homotopy on links. Relationship to existing familiar equivalence relations on spatial graphs are stated, and several invariants are defined by using the...
Démonstration d'un théorème de Penner sur la composition des twists de Dehn
Demostración de Hamilton-Perelman de las conjeturas de Poincaré y Thurston.
Dénombrement des types de K-homotopie. Théorie de la déformation
Densidad de la transversalidad en multijets de variedades con borde anguloso.
Density and stability of Morse functions on a stratified space
Density of the transversality on manifolds with corners.
Depth and equivariant cohomology.
Der Conner-Floyd-Isomorphismus für Abelsche Gruppen.
Der Einfluss von K*(-) auf U* (-).
Der Pontryagin-Ring von Quotienten eines Torus.
Derivations of the Lie algebras of analytic vector fields
Derivations of vector fields
Derivations on the Nijenhuis-Schouten bracket algebra
Derivations on the restricted Nijenhuis-Schouten bracket algebra
Des espaces homogènes à la résolution de Koszul
Cette note évoque les premiers travaux de J.-L. Koszul (1947-1950) en les replaçant dans leur cadre historique et retrace en particulier le chemin qui a conduit Koszul à la résolution qui porte son nom.
Des groupes magiques ou quand des sous-groupes libres affines opèrent proprement discontinûment sur
Describing toric varieties and their equivariant cohomology
Topologically, compact toric varieties can be constructed as identification spaces: they are quotients of the product of a compact torus and the order complex of the fan. We give a detailed proof of this fact, extend it to the non-compact case and draw several, mostly cohomological conclusions. In particular, we show that the equivariant integral cohomology of a toric variety can be described in terms of piecewise polynomials on the fan if the ordinary integral cohomology is concentrated in even...