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math-ph2010★ 31 cited
On the convergence of cluster expansions for polymer gases
Rodrigo Bissacot, Roberto Fernández, Aldo Procacci
We compare the different convergence criteria available for cluster expansions of polymer gases subjected to hard-core exclusions, with emphasis on polymers defined as finite subse…
math-ph2010★ 10 cited
Phase Transition in Ferromagnetic Ising Models with Non-Uniform External Magnetic Fields
Rodrigo Bissacot, Leandro Cioletti
In this article we study the phase transition phenomenon for the Ising model under the action of a non-uniform external magnetic field. We show that the Ising model on the hypercub…