M. Idzumi, ON THE PARTITION-FUNCTION OF THE ISING-MODEL IN A MAGNETIC-FIELD ON AN ARBITRARY LATTICE, Journal of physics. A, mathematical and general, 26(18), 1993, pp. 919-922
We show that the partition function of the lung model in a magnetic fi
eld on an arbitary lattice in arbitrary dimensions is expressed by an
ensemble average of the partition functions of random-bond Ising model
s without field.