Geodesic
On the application of field-theory methods in the Ising model II. Calculation of the critical index $\eta$
Teoretičeskaâ i matematičeskaâ fizika, Tome 15 (1973) no. 3, pp. 417-426 
I. V. Volovich; E. A. Dynin; V. A. Zagrebnov; V. P. Frolov. On the application of field-theory methods in the Ising model II. Calculation of the critical index $\eta$. Teoretičeskaâ i matematičeskaâ fizika, Tome 15 (1973) no. 3, pp. 417-426. http://geodesic.mathdoc.fr/item/TMF_1973_15_3_a13/
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     title = {On the application of field-theory methods in the {Ising} {model~II.} {Calculation} of the critical index~$\eta$},
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Voir la notice de l'article provenant de la source Math-Net.Ru

The critical index $\eta$ is calculated on the basis of a functional representation for the Ising model in an approximation similar to the one used in field theory to calculate the infrared asymptotic behavior.

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