A stable classification of Lefschetz fibrations.
A Surgery Sequence in Dimension Four; The Relations with Knot Concordance.
A Theorem of Versality for Unfoldings of Complex Analytic Foliation Singularities.
A Thom isomorphism for infinite rank Euclidean bundles.
A Topological Invariant for Stable Map Germs.
A topological resolution theorem
A Total Whitehead Torsion Obstruction to Fibering over the Circle.
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 universal space for normal bundles of n-manifolds.
A user's guide to discrete Morse theory.
A Vanishing Theorem for Euler Characteristics.
A vanishing theorem for twisted Alexander polynomials with applications to symplectic 4-manifolds
In this paper we show that given any 3-manifold and any non-fibered class in there exists a representation such that the corresponding twisted Alexander polynomial is zero. We obtain this result by extending earlier work of ours and by combining this with recent results of Agol and Wise on separability of 3-manifold groups. This result allows us to completely classify symplectic 4-manifolds with a free circle action, and to determine their symplectic cones.
A volume-preserving counterexample to the Seifert conjecture.
A weak regularity theorem for real analytic optimal control problems.
We consider real analytic finite-dimensional control problems with a scalar input that enters linearly in the evolution equations. We prove that, whenever it is possible to steer a state x to another state y by means of a measurable control, then it is possible to steer x to y by means of a control that has an extra regularity property, namely, that of being analytic on an open dense subset of its interval of definition. Since open dense sets can have very small measure, this is a very weak property....
A WU formula for Euler mod 2 spaces
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.
Adams spectral sequence and higher torsion in MSp*.
In this paper we study higher torsion in the symplectic cobordism ring. We use Toda brackets and manifolds with singularities to construct elements of higher torsion and use the Adams spectral sequence to determine an upper bound for the order of these elements.