Publications and preprints

Topology

• Generalized knot groups distinguish the square and granny knots (with an appendix by David Savitt), Journal of Knot Theory and its Ramifications 18(8):1129-1157 (2009), arXiv:0706.1807.
• (with Mira Bernstein) Level structures on the Weierstrass family of cubics, Communications in Algebra 35:1249-1261 (2007), arxiv:math/0512117.
• Connectivity of finite subset spaces of cell complexes, Pac. J. Math. 217(1):175-179 (2004), arXiv:math/0304086.
• Finite subset spaces of graphs and punctured surfaces, Alg. Geom. Topology 3:873-904 (2003), arXiv:math/0210315.
• Finite subset spaces of graphs and surfaces, Ph.D. dissertation, UC Berkeley (2003).
• Finite subset spaces of S^1, Alg. Geom. Topology 2:1119-1145 (2002), arXiv:math/0209077.

Mathematical biology

• (with Mike Steel) Modelling the covarion hypothesis of nucleotide substitution, Mathematical Biosciences 147:63-91 (1998).

• Trees and Ps and things that sneeze: Markov process models of site substitution, M.Sc. thesis, University of Canterbury (1997).
• (with Mike Steel) Links between maximum likelihood and maximum parsimony under a simple model of site substitution, Bulletin of Mathematical Biology 59(3):581-607 (1997).

Mathematical creative writing

• Popping Bubbles, Notices of the AMS 54(6):746-747 (2007).

• Well, what do you do then?, written at BIRS Workshop 04w5555 on Creative Scientific Writing (2004).

• The keg index and a mathematical theory of drunkenness, Mathematical Intelligencer 24(3):34-36,67 (2002).

• The Great Epsilon Shortage, Mathematical Intelligencer 21(4):37 (1999).