  An attempt is made to generate the bimaximal mixings of the three species of
neutrinos from the textures of the right-handed Majorana neutrino mass
matrices. We extend our earlier work in this paper for the generation of the
nearly degenerate as well as the inverted hierarchical models of the
left-handed Majorana neutrino mass matrices using the non-diagonal textures of
the right-handed Majorana neutrino mass matrices and the diagonal form of the
Dirac neutrino mass matrices, within the frame work of the seesaw mechanism in
a model independent way. Such Majorana neutrino mass models are important to
explain the recently reported result on the neutrinoless double beat decay
(0/nu/beta/beta) experiment,together with the earlier established data on LMA
MSW solar and atmospheric neutrino oscillations.
