Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Three Neutrino Oscillations in Uniform Matter   Following similar approaches in the past, the Schrodinger equation for three
neutrino propagation in matter of constant density is solved analytically by
two successive diagonalizations of 2x2 matrices. The final result for the
oscillation probabilities is obtained directly in the conventional parametric
form as in the vacuum but with explicit simple modification of two mixing
angles ($\theta_{12}$ and $\theta_{13}$) and mass eigenvalues.

36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
19
The categories of this paper are: eess
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph