The trigonometric KZ equations associated with a Lie algebra \g depend on a
parameter \lambda\in\h where \h\subset\g is the Cartan subalgebra. We
suggest a system of dynamical difference equations with respect to λ
compatible with the KZ equations. The dynamical equations are constructed in
terms of intertwining operators of \g-modules.Comment: 23 pages, AmsTeX, third version, some misprints were correcte