Geodesic
Convergence of Feynman diagram expansions in the Ising model
Teoretičeskaâ i matematičeskaâ fizika, Tome 30 (1977) no. 1, pp. 138-141 
N. M. Bogolyubov. Convergence of Feynman diagram expansions in the Ising model. Teoretičeskaâ i matematičeskaâ fizika, Tome 30 (1977) no. 1, pp. 138-141. http://geodesic.mathdoc.fr/item/TMF_1977_30_1_a15/
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Voir la notice de l'article provenant de la source Math-Net.Ru

Estimates for vertex factors of the Feynman graphs in the Ising model are obtained. These estimates demonstrate the existence of some simple divergent subsequences of diagrams.

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