Integrability as Effective Principle of Nonperturbative Field and String Theories
Abstract
One of the perspectives in modern quantum field and string theory is related with the attempts to go beyond the perturbation theory. It turns out that a key principle in the formulation of all known non-perturbative results is integrability, i.e. arising of the structures of completely integrable systems. I discuss several important steps in this direction and speculate on its further possible development.
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