M.A. British Columbia
History of mathematics and mechanics; analysis from 1700, in particular the calculus of variations; foundations of mathematics; J.L. Lagrange, Leonhard Euler, Augustin Cauchy, Carl Gustav Jacobi, Adolph Mayer, Karl Weierstrass. Modern cosmology, interactions of theoretical and observational cosmology 1920-1965.
Associate editor, Historia Mathematica, Consulting editor, New Dictionary of Scientific Biography (2008), Editor, Historia Mathematica (2000-2006) ; Mathematics editor, The History of Modern Science and Mathematics Volumes 1-4 (2002).
President, Canadian Society for the History and Philosophy of Mathematics
Executive Council, Immediate Past Chair International Commission on the History of Mathematics
Member (effective), International Academy of the History of Science
American Mathematical Society
History of the calculus of variations 1806-1917; concept of integral in Euler's analysis; history of complex analysis; foundations of Euclidean geometry; conceptual foundations of analysis; Hamilton-Jacobi theory; celestial dynamics since Laplace; relativistic cosmology in the 1920s and 1930s.