Lenny Ng

Professor
Department of Mathematics
Duke University

Office: Physics 216
Phone: 919-660-6972
Email: lenhard dot ng at duke dot edu
(further contact information here)


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Papers and preprints

Teaching (Spring 2026: Math 612)

Travel schedule

Contact information

Curriculum vitae

Legendrian knot and link atlases

Legendrian knot gallery

Putnam solutions

About me











Duke undergraduate research opportunities in math for summer 2026: applications for Math+ (deadline: February 15) and PRUV are now open. (January 2026)

Solutions to the 2025 Putnam competition are now available. (December 2025)

I help to organize the Triangle Topology Seminar, a joint seminar between Duke, NCSU, and UNC. Here is a link to upcoming seminars.

I am an editor for the journal Quantum Topology. Please send me a message if you are interested in submitting an article, especially in symplectic and contact topology.