On Branched Coverings of the 3-Sphere.
On bundles over a sphere with fibre Euclidean space
On C2-Diffeomorphisms of the Circle which are of Type III1.
On c-actions on compact complex manifolds with many compact orbits.
On Cartesian factors and the topological classification of linear metric spaces
On Cartesian powers of 2-polyhedra
On c-continuous fundamental groups
On CE-images of the Hubert cube and characterization of Q-manifolds
On central extensions of mapping class groups.
On Certain Permuation Representations of Mapping Class Groups.
On Chern-Simons invariants of geometric 3-manifolds.
On chirality groups and regular coverings of regular oriented hypermaps
We prove that if the Walsh bipartite map of a regular oriented hypermap is also orientably regular then both and have the same chirality group, the covering core of (the smallest regular map covering ) is the Walsh bipartite map of the covering core of and the closure cover of (the greatest regular map covered by ) is the Walsh bipartite map of the closure cover of . We apply these results to the family of toroidal chiral hypermaps induced by the family of toroidal bipartite maps...
On classification of -manifolds according to genus
On classification of immersions of n-manifolds in (2n-1)-manifolds.
On closed 4-manifolds admitting a Morse function with 4 critical points
On closed sets with convex projections in Hilbert space
Let k be a fixed natural number. We show that if C is a closed and nonconvex set in Hilbert space such that the closures of the projections onto all k-hyperplanes (planes with codimension k) are convex and proper, then C must contain a closed copy of Hilbert space. In order to prove this result we introduce for convex closed sets B the set consisting of all points of B that are extremal with respect to projections onto k-hyperplanes. We prove that is precisely the intersection of all k-imitations...
On closed subgroups of the group of homeomorphisms of a manifold
Let be a triangulable compact manifold. We prove that, among closed subgroups of (the identity component of the group of homeomorphisms of ), the subgroup consisting of volume preserving elements is maximal.
On codimension one submersions of euclidean spaces.
On Codimension-one Foliations of Constant Mean Curvature.
On Cohomology of Singularities of C°° Mapping.