​Designed for non-mathematicians, physics students as well for example,  who want to learn about this important area of mathematics

Well organized and touches upon the main subjects, which offer a deeper understanding of the orbit structure of an algebraic group

Painless presentation places the subject within reasonable reach for mathematics and physics student at the graduate level

Nolan R. Wallach is professor of mathematics at the University of California, San Diego. Awards include the Alfred Sloan Fellowship 1972-1974, the Linback Award for Research Excellence, 1977, Honorary Professor, University of Cordoba, Argentina, 1989, and Elected Fellow of the American Academy of Arts and Sciences, 2004. Professor Wallach has over 135 publications including (with Roe Goodman) Symmetry, Representations, and Invariants (Graduate Texts in Mathematics, vol. 255).