In neutrino physics, the hierarchy of neutrino masses as well as the absolute values of neutrino masses are still open-ended questions that seek answers.The greatest obstacle in the neutrino physics related to the indeterminacy in the difference of the squared neutrino masses was avoided by introducing two conjectures: one presents all three neutrinos in the form of plane waves and the other introduces the relation between interconnections of masses of neutrinos. Defining the mathematical models of the mass hierarchy it is proven in the theoretical discussion that the same number n is present on two levels: on the macroscopic level between corresponding wavelengths and on the microscopic level between corresponding squared masses differences. The mathematical model was also developed to determine the absolute values of neutrino masses. Absolute values of neutrino masses were calculated, and then, their sum was shown to be consistent with the sum of neutrino masses in the cosmology.