  We propose a simple Ansatz for the three generation neutrino mass matrix
$M_\nu$ which is motivated from an SO(10) grand unified theory. The Ansatz can
be combined with information from neutrino oscillation experiments and bounds
on neutrinoless double beta decay to determine the neutrino masses themselves
and to reconstruct, with some assumptions, the matrix $ M_\nu $ .

High Energy Physics - Phenomenology