## Geometry and Topology

•  Angela Wu, Louisiana State
•  Obstructing Lagrangian concordance
•  05/25/2022
•  3:00 PM - 4:00 PM
•  C304 Wells Hall (Virtual Meeting Link)
•  Honghao Gao (gaohongh@msu.edu)

Two knots are said to be concordant if they jointly form the boundary of a cylinder in four-dimensional Euclidean space. In the symplectic setting, we say they are Lagrangian concordant if the knots are Legendrian and the cylinder is Lagrangian. We can ask: what Legendrian knots can be both concordant to and from the unstabilized Legendrian unknot? In this talk I'll explain a strategy that can be used to obstruct many knots from this double concordance.

## Contact

Department of Mathematics
Michigan State University