An effective algorithm to get linking numbers of the 3-manifolds.
An elementary approach to the mapping class group of a surface.
An indecomposable -complex. II.
An infinite-dimensional torsion-free FP...group.
An introduction to the abelian Reidemeister torsion of three-dimensional manifolds
These notes accompany some lectures given at the autumn school “Tresses in Pau” in October 2009. The abelian Reidemeister torsion for -manifolds, and its refinements by Turaev, are introduced. Some applications, including relations between the Reidemeister torsion and other classical invariants, are surveyed.
Approximation L2-invariants by Their Finite-Dimensional Analogues.
Artin groups of finite type are biautomatic.
Aspherical four-manifolds and the centres of two-knot groups.
Aspherical Group Presentations.
Asphericity of symmetric presentations
Using the notion of relative presentation due to Bogley and Pride, we give a new proof of a theorem of Prishchepov on the asphericity of certain symmetric presentations of groups. Then we obtain further results and applications to topology of low-dimensional manifolds.
Augmented group systems and n-knots.