# 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 2017:

- Mondays 10:30-12:00
- Tuesdays 2:45-3:45
- Fridays 1:00-2:00

and by appointment.

### Research Areas and Keywords

##### Geometry: Differential & Algebraic

##### Mathematical Physics

##### Topology

Ng, L, and Schultz, M. "k-Ordered Hamiltonian Graphs." *Journal of Graph Theory* 24.1 (1997): 45-57.

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

Ng, L, Rutherford, D, Shende, V, and Sivek, S. "The cardinality of the augmentation category of a Legendrian link (Accepted)." *Mathematical Research Letters*.

Cieliebak, K, Ekholm, T, Latschev, J, and Ng, L. "Knot contact homology, string topology, and the cord algebra (Submitted)."

Ekholm, T, Ng, L, and Shende, V. "A complete knot invariant from contact homology (Submitted)." Open Access Copy

Ng, L, Rutherford, D, Shende, V, Sivek, S, and Zaslow, E. "Augmentations are Sheaves (Submitted)." Open Access Copy

Ng, L. "Plane curves and contact geometry." *Proceedings of G\~A{\P}kova Geometry-Topology Conference 2005
(2006), 165-174*.

Ng, LL. "The Legendrian satellite construction." *Appears as part of"Legendrian solid-torus links", J. Symplectic
Geom. 2 (2005), No. 3, 411-443*.

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