Daniel Ueltschi
Cluster Expansions and Correlation Functions
(67K, latex2e + eps figures)

ABSTRACT.   A cluster expansion is proposed, that applies to both continuous and discrete systems. The assumption for its convergence involves an extension of the neat Koteck -Preiss criterion. Expressions and estimates for correlation functions are also presented. The results are applied to systems of interacting classical and quantum particles, and to a lattice polymer model.