A special type of triangulations in numerical nonlinear analysis.
To calculate the zeros of a map f : Rn → Rn we consider the class of triangulations of Rn so that a certain point belongs to a simplex of fixed diameter and dimension. In this paper two types of this new class of triangulations are constructed and shown to be useful to calculate zeros of piecewise linear approximations of f.
A stability theorem for foliations with singularities [Book]
A Theorem of Versality for Unfoldings of Complex Analytic Foliation Singularities.
A type of non-equivalent pseudogroups. Application to foliations
A topological result for non-Hausdorff spaces is proved and used to obtain a non-equivalence theorem for pseudogroups of local transformations. This theorem is applied to the holonomy pseudogroup of foliations.
A volume-preserving counterexample to the Seifert conjecture.
Abel's Theorem and Webs.
About Stefan's definition of a foliation with singularities : a reduction of the axioms
Actions de groupes sur les -variétés non séparées et feuilletages de codimension un
Actions localement libres du groupe affine.
Addendum à «Publier sous l’occupation I», Revue d’Histoire des Mathématiques, 15 (2009), 5–57
Algebraic tubular neighbourhoods II.
Algebras of functions on groupoid of some special foliations.
Algèbres de Maurer-Cartan et Holonomie
Algébricité de l'espace de feulletages d'un espace analytique compact.
Algebroid nature of the characteristic classes of flat bundles
The following two homotopic notions are important in many domains of differential geometry: - homotopic homomorphisms between principal bundles (and between other objects), - homotopic subbundles. They play a role, for example, in many fundamental problems of characteristic classes. It turns out that both these notions can be - in a natural way - expressed in the language of Lie algebroids. Moreover, the characteristic homomorphisms of principal bundles (the Chern-Weil homomorphism [K4], or the...
An extension theorem for sober spaces and the Goldman topology.
An inequality for the rank of a web and webs of maximum rank
Analytic Foliations and the Theory of Levels.
Analytische periodische Strömungen auf kompakten komplexen Räumen.