Online Constrained Forest and Prize-Collecting Network Design
Jiawei Qian, Seeun William Umboh, and David P. Williamson
Algorithmica, to appear.
The Unbounded Integrality Gap of a Semidefinite Relaxation of the Traveling Salesman Problem
Samuel C. Gutekunst and David P. Williamson
Greedy Algorithms for the Single-Demand Facility Location Problem
Sin-Shuen Cheung and David P. Williamson
Operations Research Letters 45:452-455, 2017.
The Subtour LP for the Traveling Salesman Problem
University of Illinois, Industrial and Enterprise Systems Engineering. Champaign, IL, USA.
April 21, 2016.
A Simple 3/4-Approximation Algorithm for the Maximum Satisfiability Problem
University of Pennsylvania, Theory CS Seminar. Philadelphia, PA, USA.
April 01, 2016.
An Experimental Evaluation of the Best-of-Many Christofides' Algorithm for the Traveling Salesman Problem
6th Workshop on Combinatorial Optimization. Cargèse, Corsica, France.
September 17, 2015.
David P. Williamson is a Professor at Cornell University in the School of Operations Research and Information Engineering.
He received his Ph.D. in Computer Science from MIT under Professor Michel X. Goemans in 1993. After a postdoc at Cornell under Professor Éva Tardos, he was a Research Staff Member for IBM Research at the T.J. Watson Research Center in Yorktown Heights, New York. From 2000 to 2003, he was the Senior Manager of the Computer Science Principles and Methodologies group at IBM's Almaden Research Center in San Jose, California. He moved to Cornell University in 2004.
His research focuses on finding efficient algorithms for hard discrete optimization problems, with a focus on approximation algorithms for problems in network design, facility location, and scheduling. Other interests include algorithms for information networks.
His graduated Ph.D. students are:
- Anke van Zuylen, June 2008 (Assistant Professor, William and Mary Math)
- Chandrashekhar Nagarajan, August 2008 (Facebook)
- Yogeshwer Sharma, August 2010 (Facebook)
- Jiawei Qian, January 2012 (JW Capital)
- James Davis, August 2015 (Uber)
- Sin-Shuen Cheung, January 2016 (Bank of America)
- Alice Paul, August 2017 (Postdoc, Brown University)
His current Ph.D. students are:
- Sam Gutekunst