文档介绍：arXiv:hep-th/9902033 v2 1 Apr 1999
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I. INTRODUCTION
Major advances in supersymmetric field theory and string theory in various dimensions
have led to the understanding that it mon for apparently different quantum field
theories to be quantum-mechanically equivalent. Two theories which are “dual” in this
way may be thought of as two choices of variables in a path integral representation for the
same generating functional. Not that such “duality relations” are new; the relation between
position space and momentum space representations of quantum mechanical systems are
of this type; the order-disorder-fermion representations of the Ising model, the ident