NEUTRINO MASSES IN FLIPPED SU(5)

We analyse the fermion masses and mixings in the flipped SU(5) model. The fermion mass matrices are evolved from the GUT scale down to m(W) by solving the renormalization group equations for the Yukawa coupling s. The constraints imposed by the charged-fermion data are then utilis ed to make predictions about the neutrino properties. It is found that the generalized see-saw mechanism which occurs naturally in this mode l can provide (i) a solution to the solar neutrino problem via the MSW mechanism and (ii) a sufficiently large nu(tau) mass to contribute as a hot dark matter component as indicated by the recent COBE data.