  Because of the difficulty in getting the analytic formula of relative entropy
of entanglement, it becomes troublesome to study the monogamy relations of
relative entropy of entanglement for three-qubit pure states. However, we find
that all generalized W states have the monogamous property for relative entropy
of entanglement by calculating the relative entropy of entanglement for the
reduced states of the generalized W states in three-qubit systems.
