Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Solar Neutrino Problem and Gravitationally Induced Long-wavelength
  Neutrino Oscillation   We have reexamined the possibility of explaining the solar neutrino problem
through long-wavelength neutrino oscillations induced by a tiny breakdown of
the weak equivalence principle of general relativity. We found that such
gravitationally induce oscillations can provide a viable solution to the solar
neutrino problem.

16
The categories of this paper are: stat
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an