Another proof of functoriality for odd Khovanov homology | Dean Spyropoulos
Starts at: 2025-08-12 09:00AM
Ends at: 2025-08-12 09:25AM
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.