- 2011: Elected to the National Academy of Sciences (India)
- 2011: Canadian Math Society Public Lecture (December 2011)
- 2011: Inventor of the Year, University of Toronto
- 2009: Fields Institute-Carleton University Distinguished Lectures
- 2006: Canadian Math Society Public Lecture (December 2006)
- 2004: CRM-University of Ottawa Distinguished Lecture Series
- 2003: Elected Fellow of the Fields Institute
- 1998: UWO Distinguished Lecture Series, Univ of Western Ontario
- 1997: PIMS Special Colloquium, University of Alberta
- 1996: Myhill Lectures, SUNY Buffalo
- 1995: Ferran Sunyer Balaguer Prize (joint with R. Murty)
- 1995: Elected to the Royal Society of Canada
- 1995: E. W. R. Steacie Fellow
- 1991-92: Coxeter-James Prize