Key points are not available for this paper at this time.
Conditions are given for the renormalization-group transformations of the Hamiltonian of a thermodynamic system which lead to a discontinuity in an order parameter.Received 20 March 1975DOI:https://doi.org/10.1103/PhysRevLett.35.477©1975 American Physical Society
Nienhuis et al. (Mon,) studied this question.