Lewis J.T., Pfister Ch-Ed., Sullivan W.G.
Large deviations and the thermodynamic formalism: a new proof of the 
equivalence of ensembles
(32K, LaTeX)

ABSTRACT.  We give a new proof of the equivalence of ensembles for lattice
systems, but our method applies to more genral situations.
Our main result may be stated
roughly as : equivalence of ensembles holds at the level of measures
whenever it holds at the level of thermodynamic functions