- Talk at U. Delaware conference: Finite Geometry and Extremal Combinatorics, August 22nd, 2019.

pdf - Talk given in U. Delaware Discrete Math Seminar, November 5th, 2018

pdf - Talk give in U. Delaware Discrete Math Seminar, May 7th, 2018

pdf - Talk given at U. Delaware, November 11, 2016.

pdf - Talk at Finite Groups and Vertex Algebras, Conference

in honor of Robert L. Griess Jr. on the occasion of his 71st birthday, Academia Sinica, Taipei, August 23rd, 2016.

pdf - Talk at Beijing International Mathematics Research center,

July 25th, 2016 - Talk at New Directions in Combinatorics, IMS NUS Singapore, May 26th 2016. pdf
- Talk at The 2016 Gainesville International Number Theory Conference, March 20, 2016.

pdf - Colloquium talk at James Madison University, February 8th, 2016

pdf - Talk given at U. Delaware, October 22nd 2015. pdf
- Millican Colloquium talk, University of North Texas, Denton, March 24th, 2014.

pdf - Talk given in the Discrete Mathematics Seminar, Texas State University, San Marcos, March 21st, 2014.

pdf - Talk given at Conference “The Mathematics of John Thompson”, Cambridge, UK, September 11th, 2013.

pdf - Three lecture given at “Workshop and Conference on Exceptional Groups, Coxeter Groups and their Geometries”,

Indian Statistical Institute, Bangalore, India, December 10-21 2012.

First lecture

Second lecture

Third lecture - Talk given at conference “Finite Groups, Representations and Related Topics”, Oxford, UK, August 23rd, 2012.pdf
- Talk given at AMS meeting Tampa, March 10th, 2012.

pdf - Talk given at U. Delaware, April 27th, 2011.

pdf - Talk given at ICM satellite conference on Buildings, Finite Geometries

and Groups, Bangalore, India, August 30th, 2010.

pdf - Talk given at conference on Designs, Codes and Geometries,

Lewes, Delaware, March 30th, 2010.

pdf - Talk given at University of Arizona, November 7th, 2009.

pdf - Talk given at Universiti Sains Malaysia, Penang, Malaysia, June 9th, 2009.

pdf - Talk given at workshop on Invariants of Incidence Matrices, Banff International

Research Station, Canada, March 30th, 2009.

pdf - Colloquium talk, U. Delaware, November 24th, 2008

pdf - Talk given at the London Mathematical Society Triangle

Conference, University of Birmingham, UK, June 18th, 2008

pdf - Talk given in the Institute for Advanced Study/Princeton University

Number Theory Seminar, May 8th, 2008

pdf - Local Methods in Group Theory, conference in honor of George Glauberman, U. Chicago, March 2008.
- Talk given at the Chat Yin Ho Memorial Conference on Combinatorics and Groups, February 21-24, 2008 pdf
- Talk given at “Group representations and combinatorics”,

Gainesville, September 13th, 2007

pdf - Talk given at U. Delaware, November 17th, 2006

pdf - Talk given in Graduate Algebra Seminar, February, 2007.

pdf - Talk given at U. Delaware, December 9th, 2005

pdf - Talk given at AMS meeting in Delaware, April 2nd, 2005

pdf - Talk given at Mobile, AL, November 11th, 2004

pdf