Lenny Ng Associate Professor Mathematics Department Duke University Office: Physics 231 Phone: 919-660-6972 Email: ng at math dot duke dot edu (further contact information here)

Papers and preprints Teaching (Spring 2012: Math 128S; Fall 2011: Math 262) Travel schedule Contact information Other professional information (CV, publication list) Mathematical links Legendrian knot and link atlases About me Solutions to the 2011 Putnam competition are now available. Duke Magazine (January-February 2010) has a nice story about Duke's Putnam program. For the past two years, a panel of people at Duke, including me, have held a Math Jam chat, hosted by Art of Problem Solving, to discuss Duke's undergraduate program (especially in math) with prospective students. Here are the transcripts from our chats: October 2011; November 2010. 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).