Generation of Large Flavor Mixing from Radiative Corrections

We provide a model independent criterion which would guarantee a large flavor mixing of two quasidegenerate Majorana neutrinos at the low scale, irrespective of the mixing at the high scale. We also show that such a situation is realizable for a phenomenologically interesting range of parameters of the weak scale theory. We further claim that for a similar condition to be implementable for the three generation case, the $\mathrm{CP}$ parity of one of the neutrinos needs to be opposite to that of the others.