Cuerno, RodolfoSierra, GermánGómez, César2010-03-082010-03-081993-06Journal of Geometry and Physics, 1993, vol. 11, n. 1-4, p. 453-4620393-0440https://hdl.handle.net/10016/715510 pages, 7 figures.-- PACS nrs.: 05.50.+q, 02.90.+p, 75.10.Jm.-- MSC1991 codes: 82B23, 17B37.-- ArXiv pre-print available at: http://arxiv.org/abs/hep-th/9205109Lecture given by C.G. at the Winter School on Theoretical Physics, Wroclaw, Poland, February 1992.MR#: MR1230443 (94d:81071)^aA new open spin chain hamiltonian is introduced. It is both integrable (Sklyanin's type K matrices are used to achieve this) and invariant under Uε(sl(2)) transformations in nilpotent irreps for ε^3 = 1. Some considerations on the centralizer of nilpotent representations and its representation theory are also presented.application/pdfeng© ElsevierIntegrable modelsOpen chainsQuantum groupsresearch articleMatemáticashttps://www.doi.org/10.1016/0393-0440(93)90071-Lopen access