Cobordism Theories of Unitary Manifolds with Singularities and Formal Group Laws.
Cobordism with Retractions.
Cobordisme des entrelacs
Cobordisme des variétés algébriques
Cobordisme d'immersions
Cobordisme et groupes formels
Cobordisme fibré et approximation d’une sous-variété singulière par des sous-variétés
Dans cet article, on montre comment le cobordisme d’applications et le cobordisme fibré fournissent les obstructions à des problèmes de lissage topologique de singularités avec un lieu singulier compact. On calcule dans le cas des petites dimensions les groupes de cobordisme fibré. Les résultats connus sur le cobordisme fibré ou sur son image dans le cobordisme d’application permettent le calcul d’un certain nombre de ces obstructions.
Cobordismes de plongments et produits homotopiques
Cobordismo di immersioni di codimensione uno
Cobordisms and Reidemeister torsions of homotopy lens spaces.
Cobordisms of fold maps of 2k+2-manifolds into
We calculate the group of cobordisms of k-codimensional maps into Euclidean space with no singularities more complicated than fold for a 2k+2-dimensional source manifold in both oriented and unoriented cases.
Cocordance and Isotopy of Smooth Embeddings in Low Codimensions.
Codimension one foliations on solvable manifolds.
Codimension one foliations without compact leaves.
Codimension one minimal foliations and the fundamental groups of leaves
Let be a transversely orientable transversely real-analytic codimension one minimal foliation of a paracompact manifold . We show that if the fundamental group of each leaf of is isomorphic to , then is without holonomy. We also show that if and the fundamental group of each leaf of is isomorphic to (), then is without holonomy.
Codimension two immersions of oriented Grassmann manifolds.
Codimension two transcendental submanifolds of projective space
We provide a simple characterization of codimension two submanifolds of that are of algebraic type, and use this criterion to provide examples of transcendental submanifolds when . If the codimension two submanifold is a nonsingular algebraic subset of whose Zariski closure in is a nonsingular complex algebraic set, then it must be an algebraic complete intersection in .
Cohomologically Kähler manifolds with no Kähler metrics.
Cohomologie basique et dualité des feuilletages riemanniens
Nous démontrons des théorèmes de dualité de Poincaré et de de Rham pour la cohomologie basique et l’homologie des courants transverses invariants d’un feuilletage riemannien.
Cohomologies de certaines formes sphériques