22–25 Sept 2025
Palazzo del Castelletto
Europe/Rome timezone

Monodromies and visual primeness

25 Sept 2025, 09:00
1h
Aula Dini (Palazzo del Castelletto)

Aula Dini

Palazzo del Castelletto

Via del Castelletto, 17/1, 56126 Pisa PI

Speaker

Dr Lukas Lewark (ETH Zürich, Switzerland)

Description

If a knot decomposes as a connected sum, is this decomposition visible in a diagram of the knot? We will see that the answer is "yes", for so-called alternative diagrams. This partially resolves a conjecture posed by Cromwell in 1991. The proof relies on a new criterion for the existence of fixed arcs of (partial) monodromies. No prior knowledge of monodromies or knot diagrams will be assumed. Joint work with Peter Feller and Miguel Orbegozo Rodriguez.

Primary author

Dr Lukas Lewark (ETH Zürich, Switzerland)

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