This talk will introduce a new invariant of tangles derived from Khovanov homology. As application, this may be used to construct an invariant of strong inversions of knots in the three-sphere and, in turn, produces an object that is quite sensitive to non-amphicheirality. Surprisingly, this new invariant picks up information that is not detected by the Jones polynomial or, more generally, Khovanov homology.
Khovanov homology and the symmetry group of a knot.
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Nom de l'orateur
Liam Watson
Etablissement de l'orateur
University of Glasgow
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Lieu de l'exposé
Salle des séminaires