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Low-Dimensional Topology

Low-Dimensional Session Talk #2.2

Subevent of Low-Dimensional Session #2

HUMB 144

Another proof of functoriality for odd Khovanov homology | Dean Spyropoulos

Times: 2025 Aug 12 from 09:00AM to 09:25AM (Central Time (US & Canada))

Webinar link: Icon: video Webinar

Another proof of functoriality for odd Khovanov homology

Dean Spyropoulos ⟨spyropou@msu.edu⟩

Abstract:

In 2024, Migdail and Wehrli proved that odd Khovanov homology is functorial with respect to link cobordism (up to sign). Unlike Khovanov’s proof that the original theory is functorial, Migdail-Wehrli’s is interesting in that it does not depend on any of the recent extensions of odd Khovanov homology to tangles. In recent ongoing work, we adapt Khovanov’s original argument to one of these tangle theories to get a proof that Naisse-Putyra’s odd tangle invariant is functorial with respect to tangle cobordisms (up to unit). This approach motivates a few novel constructions, including a new generalization of Hochschild (co)homology.

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