[K-OS] Knot Online Seminar

[K-OS] is an online research seminar which focuses on knot theory and low-dimensional topology. It happens every Thursdays from 14:00 to 15:00 (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

  • Speaker: Arunima Ray (Max Planck Institute für Mathematik)
  • Title: Slicing knots in definite 4-manifolds
  • Abstract: I will give an overview on questions related to slicing knots in 4-manifolds more general than the 4-ball. Then, I will focus on the ℂℙ2-slicing number of knots, which is by definition the smallest integer m such that the given knot bounds a properly embedded, null-homologous disk in m(ℂℙ2) minus a ball. Specifically, I will give a lower bound on the smooth ℂℙ2-slicing number and an upper bound on the topological ℂℙ2-slicing number, and describe situations where these quantities are large/small/distinct. The talk will be based on joint work with Alexandra Kjuchukova, Allison Miller, and Sumeyra Sakalli.


  • Speaker: Benjamin Audoux (Aix–Marseille Université)
  • Title: TBA
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  • Speaker: JungHwan Park (Korea Advanced Institute of Science and Technology)
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  • Speaker: Vincent Florens (Université de Pau et des Pays de l'Adour)
  • Title: TBA
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