David G. Wagner

Department of Combinatorics and Optimization
Faculty of Mathematics
University of Waterloo
Waterloo, Ontario

dgwagner (at) math.uwaterloo.ca

+1 (519) 888-4567 x32487

Before enlightenment
chopping wood
carrying water

After enlightenment
chopping wood
carrying water

Combinatorics of electrical networks

Notes for a series of lectures prepared for the Undergraduate Summer Research Assistants of the C&O Department in 2009.

Multivariate stable polynomials: theory and applications

A survey of the recent work of Julius Borcea and Petter Br"and'en on their multivariate generalization of the theory of univariate polynomials with only real roots, and its applications, including Gurvits's proof of the van der Waerden Conjecture. Commissioned by the A.M.S. for the Current Events Bulletin at the San Francisco meeting in January, 2010.

``In the fight between you and the world, back the world.'' -- Frank Zappa

I stumped Google.