Predicting neutrino parameters from texture zeros

The see-saw mechanism is perhaps the most attractive scenario to explain the small neutrino masses. However, at high energies it is defined by more parameters than it is possible to measure at low energies, resulting in a lack of predictability. In this talk we will review some frameworks where, using some well motivated hypotheses about the high energy physics, the see-saw mechanism does give predictions for some low energy observables. In particular, we will derive a leptonic version of the Gatto-Sartori-Tonin relation, and we will discuss the scenario with two right-handed neutrinos.