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A Convergence Proof for Linked Cluster Expansions

A. Pordt

hep-latarXiv:hep-lat/9604010

Abstract

We prove that for a general N-component model on a d-dimensional lattice d with pairwise nearest-neighbor coupling and general local interaction obeying a stability bound the linked cluster expansion has a finite radius of convergence. The proof uses Mayer Montroll equations for connected Green functions.

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