The unknotting number and classical invariants II
Geometric Topology
2013-08-05 v2
Abstract
In [BF12] the authors associated to a knot K an invariant n_R(K) which is defined using the Blanchfield form and which gives a lower bound on the unknotting number. In this paper we express n_R(K) in terms of Levine-Tristram signatures and nullities of K. In the proof we also show that the Blanchfield form with real coefficients is diagonalizable.
Keywords
Cite
@article{arxiv.1207.2413,
title = {The unknotting number and classical invariants II},
author = {Maciej Borodzik and Stefan Friedl},
journal= {arXiv preprint arXiv:1207.2413},
year = {2013}
}
Comments
26 pages, one figure