A shortened version of this paper has appeared in two parts in the Mathematical Reports of the Academy of Science of the Royal Society of Canada: (1) Lie Tori, C. R. Math. Rep. Acad. Sci. Canada Vol. 26(3), 2004, pp. 84-89, and (2) Extended affine Lie algebras, C. R. Math. Rep. Acad. Sci. Canada Vol. 26(3), 2004, pp. 90-96.
E. Neher < neher@uottawa.ca >