Yb. Wu et Zz. Zhong, HYPERBOLIC COMPLEX YANG-BAXTER EQUATION AND HYPERBOLIC COMPLEX MULTIPARAMETRIC QUANTUM GROUPS, International journal of theoretical physics, 34(11), 1995, pp. 2171-2177
The hyperbolic complex Yang-Baxter equation is equivalent to a system
consisting of two ordinary Yang-Baxter equations, and a hyperbolic com
plex quantum group is isomorphic to a direct product of two quantum gr
oups. As a concrete example, the quantum group GL(H)(Gamma; xi(ij)) wi
th hyperbolic complex multiparameter is isomorphic to a direct product
of two quantum groups GL(X; q(ij)) and GL(Y; r(ij)) with ordinary mul
tiparameter.