Nolan Wallach's mathematical research is remarkable in both its breadth and depth. His
contributions to many fields include representation theory harmonic analysis algebraic
geometry combinatorics number theory differential equations Riemannian geometry ring
theory and quantum information theory. The touchstone and unifying thread running through all
his work is the idea of symmetry. This volume is a collection of invited articles that pay
tribute to Wallach's ideas and show symmetry at work in a large variety of areas.The articles
predominantly expository are written by distinguished mathematicians and contain sufficient
preliminary material to reach the widest possible audiences. Graduate students mathematicians
and physicists interested in representation theory and its applications will find many gems in
this volume that have not appeared in print elsewhere.Contributors:D. Barbasch K. Baur O.
Bucicovschi B. Casselman D. Ciubotaru M. Colarusso P. Delorme T.Enright W.T. Gan A
Garsia G. Gour B. Gross J. Haglund G. Han P. Harris J. Hong R. Howe M. Hunziker B.
Kostant H. Kraft D. Meyer R. Miatello L. Ni G. Schwarz L. Small D. Vogan N. Wallach J.
Wolf G. Xin O. Yacobi.
