A. Abdesselam, J. Magnen, V. Rivasseau
Bosonic Monocluster Expansion
(98K, Latex 2e with 1 eps figure)

ABSTRACT.  We compute connected Green's functions of a Bosonic field theory 
with cutoffs by means of a ``minimal'' expansion which 
in a single move, interpolating a generalized propagator, 
performs the usual tasks of the cluster and Mayer expansion. 
In this way it allows a direct construction of the infinite volume 
or thermodynamic limit and it brings constructive Bosonic expansions 
closer to constructive Fermionic expansions and to perturbation theory.