After several decades of reduced contact, the interaction between physicists and mathematicians in the front-line research of both fields recently became deep and fruit- ful again. Many of the leading specialists of both fields became involved in this devel- opment. This process even led to the discovery of previously unsuspected connections between various subfields of physics and mathematics. In mathematics this concerns in particular knots von Neumann algebras, Kac-Moody algebras, integrable non-linear partial differential equations, and differential geometry in low dimensions, most im-...

Stanley Mandelstam was a very modest and friendly man impressing everyone with his sharp intellect as well as his humanity. This volume contains essays written by many of his friends and students including both detailed reports on his scientific achievements as well as personal reminiscences.