Xw. Guan et al., LAX PAIR FORMULATION FOR THE ONE-DIMENSIONAL HEISENBERG XYZ OPEN-CHAIN, Journal of the Physical Society of Japan, 65(9), 1996, pp. 2807-2810
The Lax pair for the one-dimensional Heisenberg XYZ open chain is expl
icitly constructed. Our construction provides an alternative and direc
t demonstration for the quantum integrability of the system.