### Invariants of tangles and surfaces from a perturbation of Khovanov homology

- Series
- Geometry Topology Seminar
- Time
- Monday, November 14, 2016 - 14:00 for 1 hour (actually 50 minutes)
- Location
- Skiles 006
- Speaker
- Adam Saltz – University of Georgia

Khovanov homology is a powerful and computable homology theory for links which extends to tangles and tangle cobordisms. It is closely, but perhaps mysteriously, related to many flavors of Floer homology. Szabó has constructed a combinatorial spectral sequence from Khovanov homology which (conjecturally) converges to a Heegaard Floer-theoretic object. We will discuss work in progress to extend Szabó’s construction to an invariant of tangles and surfaces in the four-sphere.