On implicit Lagrangian differential systems
Let (P,ω) be a symplectic manifold. We find an integrability condition for an implicit differential system D' which is formed by a Lagrangian submanifold in the canonical symplectic tangent bundle (TP,ὡ).
On Invariants of Hirzebruch and Cheeger-Gromov.
On iterated torus knots and transversal knots.
On Killing Characteristic Classes by Cobordism.
On knot Floer homology and cabling.
On Lie algebras of vector fields related to Riemannian foliations
Riemannian foliations constitute an important type of foliated structures. In this note we prove two theorems connecting the algebraic structure of Lie algebras of foliated vector fields with the smooth structure of a Riemannian foliation.
On link maps and their homotopy classification.
On local first order structural stability of pairings of vector fields and functions
On low dimensional S-cobordisms.
On manifolds diffeomorphic on the complement of a point
We prove that four manifolds diffeomorphic on the complement of a point have the same Donaldson invariants.
On Manifolds Representing Homology Classes in Codimension 2.
On Martinet's singular symplectic structures
On measures in fibre spaces
On nonsingular matrices and Bott periodicity.
On non-smoothly equivalent diffeomorphisms of the circle
On one-parameter families of diffeomorphisms. II: Generic branching in higher dimensions
On oriented vector bundles over CW-complexes of dimension 6 and 7
Necessary and sufficient conditions for the existence of -dimensional oriented vector bundles () over CW-complexes of dimension with prescribed Stiefel-Whitney classes , and Pontrjagin class are found. As a consequence some results on the span of 6 and 7-dimensional oriented vector bundles are given in terms of characteristic classes.
On polynomial coverings and their classification.
On Projective Varieties of Codimension 2.
On pseudo-isotopy classes of homeomorphisms of a dimensional differentiable manifold.
We study self-homotopy equivalences and diffeomorphisms of the (n+1)-dimensional manifold X= #p(S1 x Sn) for any n ≥ 3. Then we completely determine the group of pseudo-isotopy classes of homeomorphisms of X and extend to dimension n well-known theorems due to F. Laudenbach and V. Poenaru (1972,1973), and J. M. Montesinos (1979).