Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: CP-violation in oscillations of three neutrino generations: the case of
  degenerate masses   CP-symmetry violates in oscillations of neutrinos in vacuum in presence of
three generations. In this case there is an inherent complex phase in
PMNS-matrix. When any two neutrino masses degenerate the CP-violation vanishes.
In the present article different mechanisms of CP-symmetry recovery are
demonstrated in case of two degenerate neutrino mass-states.

22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics