[K-OS] Knot Online Seminar
[K-OS] is an online research seminar which focuses on knot
theory and low-dimensional topology. Talks will be delivered
by authors of recent arXiv articles that made a breakthrough
in our field.
It happens the 3rd Thursday of months
from 16:00 to 17:00
(
CET/CEST Berlin,
Brussels, Madrid, Paris, Rome, Vienna, Warsaw, Zurich)
on
Zoom.
It is organized by
Alexandra
Kjuchukova,
Lukas
Lewark,
Louis-Hadrien
Robert and
Emmanuel
Wagner.
It benefits from logistical support from
the
CNRS, the university
of
Paris and the
university of
Regensburg.
Forthcoming Talks
16/03/2023
- Speaker: Daniel López-Neumann (Indiana University)
- Title: Genus bounds for non-semisimple quantum invariants of knots
(about arXiv:2211.15010)
- Abstract: In this talk we explain how to define knot polynomials out of finite
dimensional N-graded Hopf algebras whose degrees give lower bounds to
the Seifert genus. This construction recovers known bounds, such as for
twisted Alexander polynomials, but also provides
new bounds for "non-semisimple" quantum invariants, such as the
Akutsu–Deguchi–Ohtsuki invariants, which are defined out of
representation theory of quantum sl(2) at a root of unity. This is joint
work with Roland van der Veen.