Canonical idempotents in multiplicity-free families of algebras

Talk at Representation Theory and Physics, Leeds 19 July 2016. Here are the slides for the talk. This is based on joint work with Aaron Lauve and George Seelinger; the preprint is posted on the arXiv. 

Schur-Weyl duality and the free Lie algebra

Talk at Representations of Algebraic Groups, York, 14 July 2016. Here are the slides for the talk.  This is joint work with J. Matthew Douglas; the preprint is available on the arXiv.

Schur-Weyl duality over finite fields

Talk given at Representations of Algebraic Groups and Related Objects (AlgDar2014) in Jena, Germany on 8 September 2014. Here are the slides for the talk. This is based on joint work with Dave Benson.

Decomposing tensor products of irreducible representations of algebraic groups in positive characteristic

Seminar talk at University of York, 2014 June 12. Here are the slides for the talk. This talk is a survey of recent joint work with Chris Bowman, Anne Henke, and Stuart Martin. 

Cellularity of generalized q-Schur algebras

Given at the conference Cohomology in Lie Theory, University of Oxford, 24-28 June 2013. This talk is about an elementary approach to generalized q-Schur algebras via a simple defining presentation by generators and relations. It is mostly based on the preprint arXiv: 1012.5983.  Here are the slides for the talk and here is a printable version of the slides. (Note: The preprint has been revised substantially, and as a result some of the information in the slides is now outdated.)

Rational Schur algebras

Talk at the Boulder AMS meeting, 13th April 2013. Here are the slides for the talk. This is based on joint work with Richard Dipper and Friederike Stoll.