Geodesic
A~nonlinear identity for the scattering phase of integrable models
Teoretičeskaâ i matematičeskaâ fizika, Tome 116 (1998) no. 3, pp. 362-366

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The scattering phase of quantum integrable models is found from linear integral equations of a special type. Solutions of these equations satisfy some nonlinear identities, which, in particular, relate the values of the scattering phase at the boundaries of the Fermi sphere. 
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     author = {N. A. Slavnov},
     title = {A~nonlinear identity for the scattering phase of integrable models},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {362--366},
     publisher = {mathdoc},
     volume = {116},
     number = {3},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1998_116_3_a3/}
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N. A. Slavnov. A~nonlinear identity for the scattering phase of integrable models. Teoretičeskaâ i matematičeskaâ fizika, Tome 116 (1998) no. 3, pp. 362-366. http://geodesic.mathdoc.fr/item/TMF_1998_116_3_a3/