Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamical Neutrino Mass Matrix: Large (Small) Mixing Solution to
  Atmospheric (Solar) Neutrino Oscillations   In the wake of the SuperKamiokande announcement of atmospheric neutrino
oscillations which favor the large mixing of $\nu_\mu$ with $\nu_\tau$, there
is considerable theoretical activity towards a possible understanding of the
solar neutrino deficit also in terms of the mixing of $\nu_e$ with the other
two neutrinos. A specific dynamical model is presented here for the first time
which naturally chooses the large (small) mixing solution to atmospheric
(solar) neutrino oscillations.

3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin