Recent Talks

  • An extremal problem for a constant number of 1-factors [pdf]
           8th French Combinatorial Conference
           U. Paris Sud, France - June-July 2010
           also given at
           SIAM Discrete Mathematics Conference
           Austin, TX - June 2010

  • Minimum Saturated Graphs and Ramsey Graphs [pdf]
           Institute for Pure and Applied Mathematics at UCLA
           Lake Arrowhead, CA - December 2009
           also given at
           University of Vermont / St. Michael's College Discrete Mathematics Seminar
           Burlington, VT - March 2010

  • Graph pebbling in sparse graphs [pdf]
           22nd British Combinatorial Conference
           St. Andrew's, Scotland - July 2009

  • A Sharp Lower Bound on Potentially H-Graphic Degree Sequences [pdf]
           Canadian Algorithmic and Discrete Mathematics Conference
           Montreal, Canada - May 2009

  • Generalizing the degree sequence problem [pdf][pdf-Dartmouthversion] [abstract]
           Dartmouth Combinatorics Seminar
           Hanover, NH - February 2010
           Arizona State University Discrete Mathematics Seminar
           Tempe, AZ - March 2009
           also given at
           University of Vermont / St. Michael's College Discrete Mathematics Seminar
           Burlington, VT - November 2008

  • A dual to the Turan problem [pdf] [abstract]
           Discrete Mathematics Days of Northeast
           Burlington, VT - June 2009
           an earlier version given [pdf] [abstract]
           Dartmouth Combinatorics Seminar
           Hanover, NH - October 2008

  • How to beat your friends at the Dots-and-Boxes game [pdf]
           Governor's Institute in Mathematical Sciences
           U. Vermont - June, 2008

  • Degree sum conditions in graph pebbling [pdf] [abstract]
           AMS-MAA Joint Meetings
           San Diego, CA - January, 2008

  • Minimum Size of Bipartite-Saturated Graphs [pdf] [abstract]
           21st British Combinatorics Conference
           University of Reading, UK - July, 2007

  • Sum Degree of No Class [pdf] [abstract]
           20th Comberland Conference
           Emory University, Atlanta, GA - May, 2007

  • Extremal Problems on Bipartite Graphs [pdf] [abstract]
           University of Vermont Mathematics Colloquium
           Burlington, VT - April, 2007

  • Erdos, an extreme character [pdf] [abstract]
           Middlebury College Mathematics Seminar
           Middlebury, VT - March, 2007

  • Recent Results and Open Problems on the Minimum Size of Saturated Graphs [pdf] [abstract]
           University of Colorado, Denver, Discrete Mathematics Seminar
           Denver - September, 2006

  • On a Relationship of Two Extremal Functions [pdf] [abstract]
           Horizon of Combinatorics (EMS Summer School)
           Lake Balaton, Hungary - July 2006

  • An Erdos-Stone Type Conjecture[pdf]
           6th Czech-Slovak International Symposium on Combinatorics, Graph Theory, Algorithms and Applications
           Prague, Czech Republic - July 2006

  • A Lower Bound on Potentially F-Graphic Degree Sequences[pdf]
           SIAM Conference on Discrete Mathematics
           Victoria, Canada - June 2006



  • The Minimum Size of Saturated Graphs [pdf]
           UVM / St. Michael's Discrete Mathematics Seminar
           Burlington, VT - October 2005

  • The Efficiency of the Bicycle Wheel[pdf]
           Middlebury College Mathematics Department Seminar
           Middlebury, VT - October 2005

  • On the Minimum Size of Cycle Saturated Graphs[pdf]
          WaterMellon Conference on Combinatorics
           Carnegie Mellon University, Pittsburgh, PA - May 2005