[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 of significant interest. It happens the 3rd Thursday of every month from 16:15 to 17:15 (CET/CEST Berlin, Brussels, Madrid, Paris, Rome, Vienna, Warsaw, Zurich) on Zoom.

It is organized by Alexandra Kjuchukova, Lukas Lewark, Delphine Moussard and Emmanuel Wagner. It benefits from logistical support from the CNRS, the university of Paris and the ETHZ.

If there is a recent arXiv preprint which you would like to see featured on the seminar, please email the organizers with your suggestion.

The K-OS talks are also listed in a Google Calendar.

Forthcoming Talks

22 January 2026

• Speaker: Alessio Di Prisa (Scuola Normale Superiore in Pisa)
• Every negative amphichiral knot is rationally slice (arXiv:2509.21140)
• Abstract: In this talk, we prove that every negative amphichiral link is rationally slice, generalizing a result due to Kawauchi in 2009. The proof relies on a systematic analysis of the action induced by the negative amphichiral map on the JSJ decomposition of the link exterior. Using the same techniques, we show that every fibered negative amphichiral knot is strongly negative amphichiral, answering a question asked by Kim and Wu in 2016 on Miyazaki knots. This is joint work with Jaewon Lee (KAIST, Daejeon) and Oğuz Şavk (METU, Ankara).