Families of spheres
Felix Klein's paper on real flexes vindicated
In a paper written in 1876 [4], Felix Klein gave a formula relating the number of real flexes of a generic real plane projective curve to the number of real bitangents at non-real points and the degree, which shows in particular that the number of real flexes cannot exceed one third of the total number of flexes. We show that Klein's arguments can be made rigorous using a little of the theory of singularities of maps, justifying in particular his resort to explicit examples.
Final forms for a three-dimensional vector field under blowing-up
We study the final situations which may be obtained for a singular vector field by permissible blowing-ups of the ambient space (in dimension three). These situations are preserved by permissible blowing-ups and its structure is simple from the view-point of the integral branches. Technically, we take a logarithmic approach, by marking in each step the exceptional divisor of the transformation.
Finite Determinacy and Topological Triviality I.
Finite determinacy and topological triviality. II : sufficient conditions and topological stability
Finitely Determined Singularities of Formal Vector Fields.
Formation of singularities for viscosity solutions of Hamilton-Jacobi equations
Formes tangentes à des actions commutatives
Function germs defined on isolated hypersurface singularities
Generic Bifurcations of Varieties.
Generic Bifurcations of Varieties II.
Generic deformations of Lagrangian and Legendrian maps
Geometric objects with finitely determined germs
Geometry of some simple nonlinear differential operators
Germes de difféomorphismes et de champs de vecteurs en classe de différentiabilité finie
Pour tout triplet d’entiers tels que , se pose la question d’étudier les germes de difféomorphismes ou de champs de vecteurs sur , de classe , -déterminés en classe , c’est-à-dire respectivement conjugués ou équivalents en classe , à tout germe ayant la même classe et le même -jet. Cette question est abordée ici, avec quelque généralité en dimension 2 et pour les germes de champs de vecteurs de codimension 2, en dimension 3 et 4. Une conséquence de cette dernière étude est l’existence...
Global Families of Local Unfoldings.
Global stability for diagrams of differentiable applications
In this paper, we give some examples which point to the non-existence of -global stable diagrams , compact. If : is fixed we define the -equivalence for maps and the corresponding -stability. The globalization procedure works and we can compare the -stability, -infinitesimal stability, and -homotopical stability. Also we give some characterization theorems for lower dimensions.
How to Get around a Simple Quadratic Fold.
Implicit function theorem for locally blow-analytic functions
In this paper we prove the implicit function theorem for locally blow-analytic functions, and as an interesting application of using blow-analytic homeomorphisms, we describe a very easy way to resolve singularities of analytic curves.
Infinite Determincacy of Equivariant Map-Germs.