Author: Giovanni Gallavotti
Title: A proof of the Griffiths inequalities for the $XY$ model
Abstract: We present a simple generalization of the Griffiths inequalities to the XY model.
Key words: Griffiths inequalities, XY model, Equilibrium Statistical Mechanics
Giovanni Gallavotti
Fisica, Universita' di Roma 1
P.le Moro 2
00185 Roma, Italia
tel +39-06-4991-4370
fax +39-06-4957697
em giovanni.gallavotti@roma1.infn.it
http://ipparco.roma1.infn.it