This volume dedicated to Bertram Kostant on the occasion of his 65th birthday is a collection
of 22 invited papers by leading mathematicians working in Lie theory geometry algebra and
mathematical physics. Kostant's fundamental work in all these areas has provided deep new
insights and connections and has created new fields of research. The papers gathered here
present original research articles as well as expository papers broadly reflecting the range
of Kostant's work.
