Professor math; contributor, editor various professional journals.
Author: (monograph) The numerical analysis of ordinary differential equations: Runge-Kutta and general linear methods. Contributor, editor various professional journals. Fellow Institute of Mathematics and Its Applications, Royal Society New Zealand.
Member New Zealand Mathematics Society (president 1975-1976, award for mathematics research 1991), American Mathematics Society, Society for Industrial and Applied Mathematics, Association for Computing Machinery. Avocations: classical music, bridge.