Pachner move and affine volume-preserving geometry in .
Periodicity of Branched Cyclic Covers.
Polyedrische 2-Mannigfaltigkeiten mit wenigen nicht-konvexen Ecken.
Polyhedral quotient spaces
Positively curved combinatorial 3-manifolds.
Presentations of the fundamental group of a manifold
Products of open manifolds with ℝ
We present a characterization of those open n-manifolds (n ≥ 5) whose products with the real line are homeomorphic to interiors of compact (n+1)-manifolds with boundary.
Projections of knots
Projective and Hilbert modules over group algebras, and finitely dominated spaces.
Properly homotopic nontrivial planes are isotopic
It is proved that two planes that are properly homotopic in a noncompact, orientable, irreducible 3-manifold that is not homeomorphic to are isotopic. The end-reduction techniques of E. M. Brown and C. D. Feustal and M. G. Brin and T. L. Thickstun are used.
Pseudo-Isotopies of S3 x S1.