On symmetric matrices associated with oriented link diagrams
Abstract
Let $D$ be an oriented link diagram with the set of regions $\operatorname{r}_{D}$. We define a symmetric map (or matrix) $\operatorname{\tau}_{D}\colon\operatorname{r}_{D}\times \operatorname{r}_{D} \to \mathbb{Z}[x]$ that gives rise to an invariant of oriented links, based on a slightly modified $S$equivalence of Trotter and Murasugi in the space of symmetric matrices. In particular, for real $x$, the negative signature of $\operatorname{\tau}_{D}$ corrected by the writhe is conjecturally twice the TristramLevine signature function, where $2x=\sqrt{t}+\frac1{\sqrt{t}}$ with $t$ being the indeterminate of the Alexander polynomial.
 Publication:

arXiv eprints
 Pub Date:
 January 2018
 arXiv:
 arXiv:1801.04632
 Bibcode:
 2018arXiv180104632K
 Keywords:

 Mathematics  Geometric Topology;
 57M25
 EPrint:
 13 pages, Abstract substantially shortened, Lemma 2 and Theorem 1 slightly modified