Another Space-Filling Trefoil Knot.
Approximating homotopy equivalences of surfaces by homeomorphisms
Äquivariante Whiteheadtorsion.
Area preserving pl homeomorphisms and relations in
To any compactly supported, area preserving, piecewise linear homeomorphism of the plane is associated a relation in of the smallest field whose elements are needed to write the homeomorphism.Using a formula of J. Morita, we show how to calculate the relation, in some simple cases. As applications, a “reciprocity” formula for a pair of triangles in the plane, and some explicit elements of torsion in of certain function fields are found.
Aspherical four-manifolds and the centres of two-knot groups.
Aspherical Manifolds and Higher-Dimensional Knots
Augmented group systems and n-knots.