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Aix-Marseille Université
Institut de Mathématiques de Marseille (I2M) - UMR 7373
Site Saint-Charles : 3 place Victor Hugo, Case 19, 13331 Marseille Cedex 3
Site Luminy : Campus de Luminy - Case 907 - 13288 Marseille Cedex 9

Séminaire

The signature function of positive knots

Livio Liechti
Universität Bern
https://homeweb.unifr.ch/liechtli/pub/

Date(s) : 16/05/2017   iCal
14h00 - 15h00

In the 60s, Levine and Tristram introduced the signature function, a knot invariant with strong connections to the Alexander polynomial and four-dimensional topology. After an introduction to the signature function focussing on these connections, we compare the signature functions of some classes of positive knots. In particular, we show that the signature function of a positive arborescent Hopf plumbing is monotonic.

http://www.math.unibe.ch/ueber_uns/personen/liechti_livio/index_ger.html

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