Dynamical r-Matrices Associated to $\widetilde{sl(2)}$ and Separation of Variables
Andrey Vladimirovich Tsiganov · International Journal of Modern Physics A · 1997
Outer automorphism of infinite-dimensional representations of sl(2) algebra is considered. The similar constructions for the loop algebras and yangians are presented. The corresponding linear and quadratic R-brackets include the dynamical r-matrices.