  We consider the cotangent bundle T^*F_\lambda of a GL_n partial flag variety,
\lambda = (\lambda_1,...,\lambda_N), |\lambda|=\sum_i\lambda_i=n, and the torus
T=(C^*)^{n+1} equivariant cohomology H^*_T(T^*F_\lambda). In [MO], a Yangian
module structure was introduced on \oplus_{|\lambda|=n} H^*_T(T^*F_\lambda). We
identify this Yangian module structure with the Yangian module structure
introduced in [GRTV]. This identifies the operators of quantum multiplication
by divisors on H^*_T(T^*F_\lambda), described in [MO], with the action of the
dynamical Hamiltonians from [TV2, MTV1, GRTV]. To construct these
identifications we provide a formula for the stable envelope maps, associated
with the partial flag varieties and introduced in [MO]. The formula is in terms
of the Yangian weight functions introduced in [TV1], c.f. [TV3, TV4], in order
to construct q-hypergeometric solutions of qKZ equations.
