**Selected Talks**

**Directed width parameters: algorithms and structural properties**

- DIMACS Fall 2012 Mixer, DIMACS Center, Rutgers University, October 11, 2012

- Princeton Discrete Math Seminar, Princeton University, October 18, 2012

**Realizable Paths and the NL vs L Problem**

- Theory Group Seminar, Princeton University, Dec 9, 2011.

- Algorithms and Computational Theory Group, University of Texas at Austin, May 12, 2011.

- Theory Group, IBM Almaden Research Center, San Jose, California, August 11, 2010.

**Complexity of Scarf's Lemma and Fractional Stability Problems**

6th Graduate Student Combinatorics Conference, April 3-4 2010 Auburn University.

**Complexity of Scarf's Lemma and Fractional Stability Problems**

Combinatorics, Groups, Algorithms, and Complexity, Conference in honor of Laci Babai's 60th birthday. March 21-25, 2010. The Ohio State University, Columbus, Ohio.

**Games, Equilibrium and the complexity class PPAD**

Cowles Foundation for Research in Economics, Yale University, November 12, 2009.

**Complexity of Scarf's Lemma and Related Problems**

ACO Student Seminar, Georgia Institute of Technology, March 4, 2009.

**A Distributed Protocol for Fractional Stable Paths Problem**

DIMACS/DyDAnWorkshop on Secure Internet Routing, Rutgers University, March 24-26, 2008.

**Approximating Betweenness Centrality**

5th Workshop on Algorithms and Models for the Web-Graph (WAW 2007), San Diego, CA, December 11-12, 2007.