Alexander Mazel, Aldo Procacci, Benedetto Scoppola
Gas Phase of Asymmetric Nearest Neighbor 
Ising Model
(21K, LaTeX 2e)

ABSTRACT.  We consider an asymmetric $d$-dimensional, $d > 1$, 
Ising model with the pair interaction $I$ in one direction 
different from the pair interaction $J$ in all other directions. 
We show that for any inverse temperature $\b$ the system is in the 
gas phase as soon as $|J| < C\b^{-1}d^{-2} (1-\tanh (\b |I|))$ 
with $C > 0$ being a small numeric constant.