I'm a number theorist, and, in Dyson's classification, a frog. I enjoy simple-seeming questions that lead to a richness of structure. Areas of interest include elliptic curves, algebraic divisibility sequences, Diophantine geometry, arithmetic dynamics, quadratic and hermitian forms, Bianchi groups, thin groups, hyperbolic geometry, cryptography and game theory. I enjoy problems that involve experimental mathematics, using a computer.

You can find my CV here.

Recent News

  • I've just switched the template on my website and things may be a little broken as a result. Let me know.
  • I hope I'll see you at the Seattle JMM!
  • I'm currently teaching Combinatorics
        and Discrete Math (Fall 2015).

A Brief History

Photo by Lionel Levine

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