Associate Professor, Department of Mathematics, University of Western Ontario

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.

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.

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 -- notes will be available here before too long.

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.

- Math 1600a, Linear Algebra.

- Math 9144b, Homological Algebra.
- Math 3152b, Combinatorial Mathematics.

Parental leave.

With Alex Suciu, I
organized a special session "The Algebraic Geometry and Topology of
Hyperplane Arrangements" at the AMS
spring sectional meeting in Worcester, MA, April 9-10, 2011, preceded by
a workshop at Northeastern University on April 8.

Together with Dan Cohen
and Nicole Lemire I
organized a Conference
in Honour of Peter Orlik in August, 2008 at the Fields Institute.

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.