Linking forms of amphichiral knots
arXiv:1706.07940
Abstract
We give a simple obstruction for a knot to be amphichiral, in terms of the homology of the 2-fold branched cover. We work with unoriented knots, and so obstruct both positive and negative amphichirality.
Version 2 has a new title to better reflect what is new in the paper, and historical references have been updated. 7 pages