International Symposium on Symbolic and Algebraic Computation. University of Western Ontario; 22--25 July 2001.

International Symposium on Symbolic and Algebraic Computation. Rostock, Germany; 13--15 August 1998.

Research Centre for Computer Algebra, University of Western Ontario in London, Ontario, Canada; 13 May 2000.

A workshop at ISSAC 2003. Drexel University, Philadelphia, PA, USA; Thursday 7 August 2003.

3rd IMACS Conference on Applications of Computer Algebra. Aston Wailea Resort, Wailea, Maui, Hawaii, USA; 24--26 July 1997.

COmputational COmmutative Algebra and International School on Computer Algebra. Corte Rosada Hotel Porto Conte, Italy; 23--26 May 2005.

In honor of Daniel Lazard. Paris, France; 24--26 November 2004.

5-day minicourse by Prof. John J. Cannon (University of Sydney, Australia) on "New Approaches to Computing Finite Group Invariants". Universite Libre de Bruxelles, Belgium; 15--19 April 2002.

East Coast Computer Algebra Day: a series of annual one day conferences on symbolic and mathematical computation. Clemson University, South Carolina, USA; Saturday 5 April 2003.

4th IMACS Conference on Applications of Computer Algebra. Czech Technical University, Prague, Czech Republic; 9--11 August 1998.