FUNCTIONAL INTEGRAL APPROACH TO MULTIPOINT CORRELATORS IN 2-DIMENSIONAL CRITICAL SYSTEMS

We extend a previously developed technique for computing spin-spin cri tical correlators in the two-dimensional (2D) Ising model, to the case of multiple correlations. This enables us to derive Kadanoff-Ceva's f ormula in a simple and elegant way. We also exploit a doubling procedu re in order to evaluate the critical exponent of the polarization oper ator in the Baxter model. Thus we provide a rigorous proof of the rela tion between different exponents, in the path-integral framework.