It is shown that very general features of the critical theory of the Yang-Lee edge singularity in two dimensions completely determine the way in which the theory realizes conformal invariance. This leads to the value $\sigma =-\frac{1}{6}$ for the edge exponent, and makes possible the calculation of the correlation functions.

• Received 8 January 1985

DOI:https://doi.org/10.1103/PhysRevLett.54.1354