On the first two Vassiliev invariants.
On the Floer homology of plumbed three-manifolds.
On the forcing relation for surface homeomorphisms
On the form of principal torus-bundles over toruses
On the fundamental group of a space of sections.
On the Fundamental Group of a Visibility Manifold.
On the genus of RP3 x S1.
On the genus of the complex projective plane.
On the geometric boundaries of hyperbolic 4-manifolds.
On the geometry at infinity of the universal covering of
On the Goeritz Matrix of a Link.
On the Hantzsche-Wendt Manifold.
On the homeotopy group of the non orientable surface of genus three.
On the Homeotopy Groups of Surfaces.
On the Homology of Metacyclic Coverings.
On the homology of the Harmonic Archipelago
We calculate the singular homology and Čech cohomology groups of the Harmonic Archipelago. As a corollary, we prove that this space is not homotopy equivalent to the Griffiths space. This is interesting in view of Eda’s proof that the first singular homology groups of these spaces are isomorphic.
On the homotopy classification of pairs of linked maps of manifolds into a linear space
On the Hurwitz existence problem.
On the impossibility of a generalization of the HOMFLY — Polynomial to Labelled Oriented Graphs
On the intersection forms of spin 4-manifolds bounded by spherical 3-manifolds.