Discrete Symmetry, Neutrino Magnetic Moment and the 17 Kev Neutrino
  The problem of generating large transition magnetic moments for nearly massless neutrinos in a truly three--generation case is discussed. A model to achieve the same by exploiting an octahedral symmetry is presented. The scheme also accomodates a radiatively generated mass of $17\:keV$ for a pseudo--Dirac neutrino that decays rapidly through the Majoron channel. 
Debajyoti Choudhury