**Author**: Giovanni Gallavotti

**Title**: *On
the mechanical equilibrium equations for classical systems*

**Abstract:** The aim of this note is to prove, briefly but
rigorously, that at sufficiently small activity (in fact inside the gas region)
the infinite volume correlation functions of certain systems of classical
identical particles satisfy the {\it hierarchy} of integro--differential
equations which can formally be derived from the Liouville equations for finite
systems.

In Nuovo Cimento B, **57-B**, 208-211, 1968.

**Key words: **BBGKY hierarchy, Equilibrium
Statistical MEchanics, Krkwood-Salsburg equationsFermi

Giovanni Gallavotti

Fisica, Universita' di Roma 1

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