Geodesic
Inequalities for thermodynamic mean values of operator products
Teoretičeskaâ i matematičeskaâ fizika, Tome 88 (1991) no. 2, pp. 311-313 
R. Kh. Sabirov. Inequalities for thermodynamic mean values of operator products. Teoretičeskaâ i matematičeskaâ fizika, Tome 88 (1991) no. 2, pp. 311-313. http://geodesic.mathdoc.fr/item/TMF_1991_88_2_a8/
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     author = {R. Kh. Sabirov},
     title = {Inequalities for thermodynamic mean values of operator products},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {311--313},
     year = {1991},
     volume = {88},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1991_88_2_a8/}
}
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Voir la notice de l'article provenant de la source Math-Net.Ru

Some inequalities for correlation functions are proposed. Upper and lower bounds for the ratio $\langle\{A,A^+\}\rangle/\langle[A,A^+]\rangle$ are determined.

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