His expertise is in computational combinatorics, graph theory, and theory of computer science. The Graduate Research Workshop in Combinatorics is a 2-week workshop where graduate students, postdocs, and faculty from around the world collaborate on research problems in combinatorics and graph theory. Students select the problems and work in groups to make initial progress during the workshop and continue the collaboration after the workshop to produce quality research papers. Primary support for the workshop comes from the organizing institutions and the National Science Foundation, but the Elsevier Sciences Sponsorship Fund specifically provides funds for four students from institutions outside the United States to participate in the workshop. These students are of the highest quality and will be excellent participants