Geodesic
Exactly solvable model of phase transitions
Teoretičeskaâ i matematičeskaâ fizika, Tome 71 (1987) no. 3, pp. 441-450 
Yu. M. Ivanchenko; A. A. Lisyanskii; A. E. Filippov. Exactly solvable model of phase transitions. Teoretičeskaâ i matematičeskaâ fizika, Tome 71 (1987) no. 3, pp. 441-450. http://geodesic.mathdoc.fr/item/TMF_1987_71_3_a13/
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     title = {Exactly solvable model of phase transitions},
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Voir la notice de l'article provenant de la source Math-Net.Ru

Exactly solvable model is studied which shows the phase transition taking into account only interaction between fluctuations with equal and oppositely directed momenta. Critical and tricritical behaviour influence of frozen-in impurities on the phase transition is studied and it is shown that in the narrow region proportional to the impurity concentration the phase transition is smeared.

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