Residual Torsion-Free Nilpotence, Bi-Orderability and Pretzel Knots

Abstract

The residual torsion-free nilpotence of the commutator subgroup of a knot group has played a key role in studying the bi-orderability of knot groups. A technique developed by Mayland provides a sufficient condition for the commutator subgroup of a knot group to be residually-torsion-free nilpotent using work of Baumslag. In this paper, we apply Mayland's technique to several genus one pretzel knots and a family of pretzel knots with arbitrarily high genus. As a result, we obtain a large number of new examples of knots with bi-orderable knot groups. These are the first examples of bi-orderable knot groups for knots which are not fibered or alternating.

34 pages, 4 figures, 1 table

References in corpus (1)

• Links all of whose cyclic branched covers are L-spaces

Cited by in corpus (3)

• Links all of whose cyclic branched covers are L-spaces
• Generalized torsion for knots with arbitrarily high genus
• Ordered bases, order-preserving automorphisms and bi-orderable link groups