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I have been part of the math department at the University of Western Ontario since 2002.  I received my PhD at the University of Michigan in 1999.


I am interested in a mix of combinatorics, geometry, and algebra. That includes algebraic and topological aspects of matroid theory, and arrangements of hyperplanes. I like to use techniques from algebraic geometry and commutative algebra in combinatorial settings.

I have some preprints and publications available here.


Winter 2023:

Other Activities

Conference and workshop organization:

Past events:

I am a fan of Macaulay 2 (software for commutative algebra and algebraic geometry). Greg Smith and I have written a package for computation with hyperplane arrangements.  It is included with the standard Macaulay 2 distribution (versions ≥ 1.0).

I was on sabbatical from July 2016 -- June 2017: I visited the University of Sydney from January through April, and ALTA at the University of Bremen from May through July.  During my previous sabbatical in 2009--10, I visited the EPFL (Lausanne) from September through November, and the University of Oregon from January through summer 2010.