Operator Coproduct-Realization of Quantum Group Transformations in Two Dimensional Gravity, I.

E. Cremmer, J. -L. Gervais, J. Schnittger

A simple connection between the universal $R$ matrix of $U_q(sl(2))$ (for spins $\demi$ and $J$) and the required form of the co-product action of the Hilbert space generators of t…