85 research outputs found
Pretzel Knots and q-Series
The tail of the colored Jones polynomial of an alternating link is a
-series invariant whose first terms coincide with the first terms of
the -th colored Jones polynomial. Recently, it has been shown that the tail
of the colored Jones polynomial of torus knots give rise to Ramanujan type
identities. In this paper, we study -series identities coming from the
colored Jones polynomial of pretzel knots. We prove a false theta function
identity that goes back to Ramanujan and we give a natural generalization of
this identity using the tail of the colored Jones polynomial of Pretzel knots.
Furthermore, we compute the tail for an infinite family of Pretzel knots and
relate it to false theta function-type identities.Comment: 22 Pages, 14 Figure
Foundations of topological racks and quandles
We give a foundational account on topological racks and quandles.
Specifically, we define the notions of ideals, kernels, units, and inner
automorphism group in the context of topological racks. Further, we investigate
topological rack modules and principal rack bundles. Central extensions of
topological racks are then introduced providing a first step towards a general
continuous cohomology theory for topological racks and quandles.Comment: Dedicated to Professor J\'ozef H. Przytycki for his 60th birthda
Quasi-trivial Quandles and Biquandles, Cocycle Enhancements and Link-Homotopy of Pretzel links
We investigate some algebraic structures called quasi-trivial quandles and we
use them to study link-homotopy of pretzel links. Precisely, a necessary and
sufficient condition for a pretzel link with at least two components being
trivial under link-homotopy is given. We also generalize the quasi-trivial
quandle idea to the case of biquandles and consider enhancement of the
quasi-trivial biquandle cocycle counting invariant by quasi-trivial biquandle
cocycles, obtaining invariants of link-homotopy type of links analogous to the
quasi-trivial quandle cocycle invariants in Ayumu Inoue's article
arXiv:1205.5891.Comment: 14 pages. Version 3 includes some corrections and typo fixe
A Survey of Racks and Quandles: Some recent developments
This short survey contains some recent developments of the algebraic theory
of racks and quandles. We report on some elements of representation theory of
quandles and ring theoretic approach to quandles.Comment: 13 pages. ICART 2018. To appear in Algebra Colloquiu
- …