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  5. 2025

Low-Dimensional Topology

Icon: calendar Low-Dimensional Session Talk #2.2 | 2025 Aug 12 from 09:00AM to 09:25AM (Central Time (US & Canada)) | HUMB 144

‟Another proof of functoriality for odd Khovanov homology” by Dean Spyropoulos <spyropou@msu.edu>, Unaffiliated

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.