Large Mixing Angle MSW Solution in S_3 Flavor Symmetry
  We have investigated phenomenological implications on the neutrino flavor mixings in the $S_{3L}\times S_{3R}$ symmetric mass matrices including symmetry breaking terms. We have shown how to get the large mixing angle MSW solution, $\sin^2 2 \th_\odot=0.65\sim 0.97$ and $\Delta m_{\odot}^2= 10^{-5}\sim 10^{-4}\eV^2$, in this model. It is found that the structure of the lepton mass matrix in our model is stable against radiative corrections although the model leads to nearly degenerate neutrinos. 
Morimitsu Tanimoto