COSMIC NO-HAIR THEOREM IN BRANS-DICKE COSMOLOGY

We present the proof of the cosmic no-hair theorem for anisotropic Bia nchi models in the Brans-Dicke theory. We have found that the Universe is isotropized before the extended inflation phase occurs with no str ong constrains on omega, the parameter of the theory. Besides, it is s hown that if any initial anisotropy is grown, inclusive more than in t he general relativity case, but the Universe today would still be very isotropic.