Supersymmetry and Duality in Field Theory and String Theory

Abstract

This is a set of lectures given at the 99' Cargese Summer School: Particle Physics : Ideas and Recent Developments. They contain a pedestrian exposition of recent theoretical progress in non-perturbative field theory and string theory based on ideas of duality.

Comments: JHEP LateX, 56 pages, 13 eps figures;v2 References added