Orderable 3-manifold groups

Details Orderable 3-manifold groups Orderable 3-manifold groups

2002-11-06

arxiv.org/abs/math/0211110v2

Ann. Inst. Fourier, Grenoble, 55, 1 (2005), 243-288

Mathematics

Geometric Topology

37 pages. Published version. Improvements in the organisation and presentation of the material

Scientific paper

We investigate the orderability properties of fundamental groups of 3-dimensional manifolds. Many 3-manifold groups support left-invariant orderings, including all compact P^2-irreducible manifolds with positive first Betti number. For seven of the eight geometries (excluding hyperbolic) we are able to characterize which manifolds' groups support a left-invariant or bi-invariant ordering. We also show that manifolds modelled on these geometries have virtually bi-orderable groups. The question of virtual orderability of 3-manifold groups in general, and even hyperbolic manifolds, remains open, and is closely related to conjectures of Waldhausen and others.

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