Research lectures, seminars and events
The events listed in this area are research seminars, workshops and lectures hosted by Durham University departments and research institutes. If you are not a member of the University, but wish to enquire about attending one of the events please contact the organiser or host department.
|September 2018||November 2018|
Events for 18 October 2018
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To be advised
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With the advent of knot homology theories such as Khovanov and knot
Floer homologies, new invariants to study knot concordance have been
developed. For example, Rasmussen's s-invariant, the Ozsvath-Szabo tau-invariant and the s_N invariants due to Lobb and Wu, independently, and another family of invariants introduced by Lewark and Lobb.
All these invariants share three fundamental properties, which were identified by Livingston, and were called ''slice-torus invariants'' by Lewark.
Some among the slice-torus invariants, namely s, tau and the s_N's admit a generalisation to strong concordance invariants for links. Motivated by the properties shared by these extensions, together with A. Cavallo, I gave the definition of slice-torus link invariants and studied their properties.
In this seminar I will give the definition of slice-torus link
invariants, and describe some of their properties. Finally, I will
give some applications and define some new strong concordance invariants
using Whitehead doubling.
Contact lynn.gibson@Durham.ac.uk for more information about this event.
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