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Adam Lowrance, Vassar College, Gordian distance and spectral sequences in Khovanov homology

October 16, 2018 | 3:30 pm - 4:30 pm EDT

The Gordian distance between two knots is the fewest number of crossing changes necessary to transform one knot into the other. Khovanov homology is a categorification of the Jones polynomial that comes equipped with several spectral sequences. In this talk, we show that the page at which some of these spectral sequences collapse gives a lower bound on the Gordian distance between a given knot and the set of alternating knots (and also on other related Gordian distances). We also discuss connections to the existence of torsion in Khovanov homology.

Details

Date:
October 16, 2018
Time:
3:30 pm - 4:30 pm EDT
Event Category: