Abstract
Similar to the case in vacuum, it is straightforward to describe neutrino oscillations in matter with the effective lepton flavor mixing matrix and neutrino mass-squared differences (i, j = 1, 2, 3). By calculating two sets of sum rules of and , we have derived exact expressions of and (for α, β = e, μ, τ and i = 1, 2, 3) and discussed the asymptotic behaviors of and and in very dense matter (i.e., in the limit of the matter parameter approaching infinity).
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