ON UNIVERSAL KLEINIAN GROUPS GENERATED BY 180° ROTATIONS
Abstract
A 2-universal knot is a universal knot having all branching indices 1 or 2. Here we construct the first example of a 2-universal knot which could be a hyperbolic knot (SnapPea). Hence, we could have an example of a universal group generated by 180° rotations.
Dedicated to José María Montesinos on the occasion of his 65th birthday