Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Numerical Simulations Of Particle Acceleration In Relativistic Shocks
  With Application To AGN Central Engines   Numerical modelling is performed for extreme relativistic parallel shocks
with upstream Lorentz factor $\Gamma=50$. Assuming the scattering is either
large angle or over pitch angles $\sim \Gamma^{-1}$, spectral flattening and
shock aaceleration speed-up is found. The energy gain for the first shock cycle
is $\sim \Gamma^{2}$. The likely output from relativistic shocks due to the
infall from the accretion disk to the AGN black hole is computed. Neutrinos
from proton-gamma interactions may be detectable with planned neutrino
telescopes.

27
The categories of this paper are: comp-gas
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The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph