Bäcklund loop algebras for compact and non-compact nonlinear spin models in dimensions
arXiv:math/0402114 · doi:10.1007/s11232-005-0129-3
Abstract
The Bäcklund problem is solved for both the compact and noncompact versions of the Ishimori (2+1)-dimensional nonlinear spin model. In particular, a realization of the arising Bäcklund algebra in the form of an infinite-dimensional loop Lie algebra of the Kač--Moody type is provided.
9 pages; "Nonlinear Physics: Theory and Experiment. III" (Gallipoli (Lecce) 24/06-03/07/2004)