GENERALIZED TODA FIELD-THEORIES

In this talk I describe a unified approach to Toda field theories that has been introduced by Vasiliev and myself. It allows us to formulate the classes of A(n), B-n and C-n models as unique models involving an arbitrary continuous parameter nu. For certain values of nu, the mode l describes the standard Toda theories. For other values of nu it defi nes a class of models that involve infinitely many fields. These model s interpolate between the various standard Toda field theories. They a re conformally invariant and possess infinitely many conserved higher- spin currents thus making them candidates for a new set of integrable systems.