Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Study of the Behavior of Ultra-High Energy Neutrinos   Neutrino Oscillations in the presence of strong gravitational fields are
studied specifically for Majorana neutrinos. We look at ultra high energy
neutrinos $(\sim 1$ PeV) emanating from Active Galactic Nuclei (AGN). Fluxes of
different flavor neutrinos are estimated and probabilities for different
neutrino transitions calculated.

28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
29
The categories of this paper are: funct-an