A quasi-Hopf algebra interpretation of quantum 3- j and 6- j symbols and difference equations

We consider the universal solution of the Gervais-Neveu-Felder equation in the U_q( sl₂) case. We show that it has a quasi-Hopf algebra interpretation. We also recall its relation to quantum 3- j and 6- j symbols. Finally, we use this solution to build a q-deformation of the trigonometric Lamé equation.