# Lenhard Lee Ng

- Eads Family Professor
- Professor of Mathematics

**External address:**216 Physics Bldg, 120 Science Drive, Durham, NC 27708

**Internal office address:**Box 90320, Durham, NC 27708-0320

**Phone:**(919) 660-6972

**Office Hours:**

Fall 2018:

- Mondays 2:00-3:00
- Fridays 3:00-4:00

and by appointment.

### Research Areas and Keywords

##### Geometry: Differential & Algebraic

##### Mathematical Physics

##### Topology

My research mainly focuses on symplectic topology and low-dimensional topology. I am interested in studying structures in symplectic and contact geometry (Weinstein manifolds, contact manifolds, Legendrian and transverse knots), especially through holomorphic-curve techniques. One particular interest is extracting topological information about knots through cotangent bundles, and exploring relations to topological string theory. I have also worked in Heegaard Floer theory, quantum topology, and sheaf theory, especially as they relate to Legendrian and transverse knots.

Ng, L. "Conormal bundles, contact homology and knot invariants." *Geom. Topol. Monogr.* 8: 129-144.
Full Text

Ng, L, and Thurston, D. "Grid Diagrams, Braids, and Contact Geometry." *Proceedings of Gokova Geometry-Topology Conference 2008, 120--136*.