A. Degasperis, D. Lebedev, M. Olshanetsky, S. Pakuliak, A. Perelomov, P. M. Santini
Journal of Mathematical Physics
33
(11),
3783-3793,
1992-11-01
...This result obtains by combining the Drinfeld–Sokolov formalism together with the introduction of an operator-valued spectral parameter, namely, a spectral parameter that does not commute with the space...
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