Title	Khovanov-Rozansky smooth sliceness obstructions
Creator	Lobb, Andrew
Publisher	Banff International Research Station for Mathematical Innovation and Discovery
Date Issued	2016-02-25T13:35
Description	(Joint work with Lukas Lewark). Rasmussen's invariant from perturbed Khovanov cohomology is a concordance homomorphism to the integers which also gives a lower bound on the smooth slice genus. Khovanov-Rozansky sl(n) cohomology generalizes Khovanov cohomology (which appears as the case n=2) and perturbations of it give rise both to a slew of concordance homomorphisms which are also lower bounds as well as to lower bounds which are not equivalent to concordance homomorphisms. For the case n=2 there is essentially only one perturbation, while already perturbations of the case n=3 exhibit complicated behavior. We shall discuss this.
Extent	65 minutes
Subject	Mathematics; Manifolds and cell complexes; Differential geometry; Low dimensional topology
Type	Moving Image
File Format	video/mp4
Language	eng
Notes	Author affiliation: Durham University
Series	BIRS Workshop Lecture Videos (Banff, Alta)
Date Available	2016-08-26
Provider	Vancouver : University of British Columbia Library
Rights	Attribution-NonCommercial-NoDerivatives 4.0 International
DOI	10.14288/1.0309353
URI	http://hdl.handle.net/2429/58991
Affiliation	Non UBC
Peer Review Status	Unreviewed
Scholarly Level	Faculty
Rights URI	http://creativecommons.org/licenses/by-nc-nd/4.0/
Aggregated Source Repository	DSpace

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