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


My mathematical interests fit roughly under a heading of algebraic combinatorics.  More precisely, this includes arrangements of hyperplanes and subspaces, combinatorial aspects of rational homotopy theory, and "toric topology."

I have some preprints and publications available here.

I gave some lectures on tropical compactifications of arrangement complements in June, 2012 at the summer school Arrangements in Pyrenees -- the final version of my lecture notes can be found here, to appear in the Toulouse Math Journal.

Here is a pdf version of a talk I gave at the BIRS meeting Topological methods in toric geometry, symplectic geometry and combinatorics.

I am currently accepting new PhD students.


Winter 2014:
Fall 2014:
Winter 2015:

Other Activities

Conference and workshop organization:

Upcoming events:
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): the latest version of the package is also available here for download.

I was on sabbatical from July 2009 -- June 2010: I visited the EPFL (Lausanne) from September through November, and the University of Oregon from January through summer 2010.