1-formes fermées singulières et groupe fondamental.
4 Feuilletages et mécanique hamiltonienne
A classification of the topological types of -actions on closed orientable 3-manifolds
A cohomology for foliated manifolds.
A Fatou-Julia decomposition of transversally holomorphic foliations
A Fatou-Julia decomposition of transversally holomorphic foliations of complex codimension one was given by Ghys, Gomez-Mont and Saludes. In this paper, we propose another decomposition in terms of normal families. Two decompositions have common properties as well as certain differences. It will be shown that the Fatou sets in our sense always contain the Fatou sets in the sense of Ghys, Gomez-Mont and Saludes and the inclusion is strict in some examples. This property is important when discussing...
A few remarks on the geometry of the space of leaf closures of a Riemannian foliation
The space of the closures of leaves of a Riemannian foliation is a nice topological space, a stratified singular space which can be topologically embedded in for k sufficiently large. In the case of Orbit Like Foliations (OLF) the smooth structure induced by the embedding and the smooth structure defined by basic functions is the same. We study geometric structures adapted to the foliation and present conditions which assure that the given structure descends to the leaf closure space. In Section...
A finiteness theorem for Riemannian submersions
Given some geometric bounds for the base space and the fibres, there is a finite number of conjugacy classes of Riemannian submersions between compact Riemannian manifolds.
A foliation of and other punctured 3-manifolds by circles
A Generalization of Milnor's Inequality Concerning Affine Foliations and Affine Manifolds
A Geometric Characterization of Harmonic Diffeomorphisms Between Surfaces.
A homological characterization of foliations consisting of minimal surfaces.
A Nijenhuis-type tensor on the quotient of a distribution
A note on codimension-1 foliations
A note on generalized flag structures
Generalized flag structures occur naturally in modern geometry. By extending Stefan's well-known statement on generalized foliations we show that such structures admit distinguished charts. Several examples are included.
A note on projective Levi flats and minimal sets of algebraic foliations
In this paper we prove that holomorphic codimension one singular foliations on have no non trivial minimal sets. We prove also that for , there is no real analytic Levi flat hypersurface in .
A Periodic Flow with Infinite Epstein Hierarchy.
A proof of the two-dimensional Markus-Yamabe Stability Conjecture and a generalization
The following problem of Markus and Yamabe is answered affirmatively: Let f be a local diffeomorphism of the euclidean plane whose jacobian matrix has negative trace everywhere. If f(0) = 0, is it true that 0 is a global attractor of the ODE dx/dt = f(x)? An old result of Olech states that this is equivalent to the question if such an f is injective. Here the problem is treated in the latter form by means of an investigation of the behaviour of f near infinity.
À propos d'un théorème de Charles Ehresmann sur les feuilletages
A remark on the Bott class
A remark on Thurston's stability theorem
The author gives an example showing that Thurston’s stability theorem cannot be generalized to non-oriented foliations.