Generators and defining relations for automorphism groups of free algebras.

This talk concerns the following subjects:
1) The Nagata automorphism of the polynomial algebra in
three variables;
2) The Anick automorphism of the free associative
algebra in three variables;
3) Relations for elementary automorphisms
See http://www.citebase.org/cgi-bin/citations?id=oai:arXiv.org:math/0507170