Geodesic
Effective electron-electron interaction in a group-theoretical diagram technique
Teoretičeskaâ i matematičeskaâ fizika, Tome 34 (1978) no. 2, pp. 256-266 Cet article a éte moissonné depuis la source Math-Net.Ru

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A method is developed for determining the effective interaction by means of grouptheoretical diagrams. Their general properties are considered with a view to simplifying the summation of perturbation series and justifying decouplings. 
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     title = {Effective electron-electron interaction in a~group-theoretical diagram technique},
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M. F. Olekseeva; K. D. Tovstyuk. Effective electron-electron interaction in a group-theoretical diagram technique. Teoretičeskaâ i matematičeskaâ fizika, Tome 34 (1978) no. 2, pp. 256-266. http://geodesic.mathdoc.fr/item/TMF_1978_34_2_a11/

[1] M. F. Olekseeva, K. D. Tovstyuk, TMF, 27 (1976), 222 | MR

[2] M. F. Olekseeva, K. D. Tovstyuk, TMF, 27 (1976), 386 | MR

[3] E. Vigner, Teoriya grupp, IL, 1961, str. 365