Period three actions on the three-sphere
arXiv:math/0204077 · doi:10.2140/gt.2003.7.329
Abstract
We show that a free period three action on the three-sphere is standard, i.e. the quotient is homeomorphic to a lens space. We use a minimax argument involving sweepouts.
Published by Geometry and Topology at http://www.maths.warwick.ac.uk/gt/GTVol7/paper11.abs.html