Link homology, bridge trisections, and invariants of knotted surfaces

Link homology, bridge trisections, and invariants of knotted surfaces

-
Adam Saltz (University of Georgia)
Fine Hall 314

I will describe an invariant of knotted surfaces in S^4 obtained by applying link homology to Meier and Zupan's bridge trisections. This invariant takes values in Z/2Z and distinguishes the unknotted sphere from the spun (2,3)-torus knot.  I'll finish by speculating about a relative invariant and connections to invariants of four-manifolds.