Graph Homomorphisms:

Which graphs are extremal? August 2007; PowerPoint

Graph homomorphisms, statistical physics, and quasirandom graphs March 2004; PowerPoint

Graph limits, Szemerédi's Regularity Lemma, and some Banach spaces Vienna, July 2005; PowerPoint

Random graphs and limits of graph sequences Poznan, August 2005; PowerPoint

Graph limits and graph homomorphisms, San Antonio, January 2006; PowerPoint

Limits of randomly grown graph sequences , Budapest, January 2007; PowerPoint

Convergent sequences of sparse graphs (status report) , Budapest, January 2007; PowerPoint

Graph Algebras, Tehran, April 2007; PowerPoint

Geometric representations of graphs:

Eigenvalues and geometric representations of graphs I-II-III Mathfest, MAA, August 2002; PowerPoint-I ..PowerPoint-II ..PowerPoint-III

Geometric representations of graphs, February 2000PowerPoint

Steinitz representations of graphs, August 2000 PowerPoint

Discrete analytic functions: Global information from local observation, March 2003; PowerPoint

Other:

A perfect notion (to the memory of Claude Berge) July 2004; PowerPoint

Volume Computation June 2004; PowerPoint

Critical facets of the stable set polytope, March 2000; PowerPoint

General:

Trends in Mathematics: How could they Change Education? March 2009; PowerPoint

Discrete mathematics: the last and next decade, July 2000; PowerPoint

Classical mathematics and new challenges: theorems and algorithms, August 2000; PowerPoint

Topological nonexistence results in complexity theory and combinatorics, August 2001; PowerPoint