Neutrino Conversion and Neutrino Astrophysics
  We consider main ingredients which determine neutrino transformations in media. Strong transformations relevant for the astrophysics can be due to large depth oscillations, resonance conversion, parametric resonance effect, interplay of oscillations and inelastic collisions. Properties of transitions are discussed using the graphic representation. The applications of the transitions to supernova neutrinos are described. The supernova neutrinos can probe whole neutrino mass spectrum. Their studies will help to identify the pattern of neutrino mass and mixing. 
A. Yu. Smirnov