On 4-manifolds with free fundamental group.
On 4-Manifolds with Singular Torus Actions.
On a certain move generating link-homology.
On a character of the automorphism group of a compact com-plex manifold.
On a class of diffeomorphisms defined by integro-differential operators
We study an integro-differential operator Φ: H̅¹ → L² of Fredholm type and give sufficient conditions for Φ to be a diffeomorphism. An application to functional equations is presented.
On a class of foliations and the evaluation of their characteristic classes.
On a class of spaces for which the fixed-point property is characterized by homology groups
On a Conjecture of Bredon.
On a conjecture of Carathéodory: Analyticity versus smoothness.
On a Conjecture of Magnus on the Hurwitz Monodromy Group.
On a connection with torsion zero
On a construction connecting Lie algebras with general algebras
On a covering group theorem and its applications.
On a group of holomorphic transformations in
On a Linearization Theorem of Sternberg for Germs of Diffeomorphisms.
On a multiplicativity up to homotopy of the Gugenheim map.
On a problem in effective knot theory
The following problem is investigated: «Find an elementary function such that if is a knot diagram with crossings and the corresponding knot is trivial, then there is a sequence of Reidemeister moves that proves triviality such that at each step we have less than crossings». The problem is shown to be equivalent to a problem posed by D. Welsh in [7] and solved by geometrical techniques (normal surfaces).
On a problem of S. Ulam concerning Cartesian squares of 2-dimensional polyhedra
On a proof of the JSJ theorem.
On a relation between torsion numbers and Alexander matrix of a knot