My research is concerned with two main strands of mathematics, discrete
group theory and complex analysis, focussing on the space of moduli for compact
Riemann surfaces. In addition, there are several aspects of geometry and
topology in low dimensions where these theories have great
influence, notably in the study of hyperbolic 3-manifolds and Kleinian groups.
Riemann surfaces also appear as intrinsic ingredients in much of complex
dynamics and in theoretical physics, especially string theory.