Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cosmic ray propagators in the fractional differential model of bounded
  anomalous diffusion   Fractional differential approach to cosmic ray physics problems is discussed.
A short review in this field is given, some results are represented, analyzed
and criticized. A new model called the bounded anomalous diffusion model is
offered. Its equation includes the fractional material derivative which allows
to take into account the finite speed of cosmic rays particles.

24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
2
The categories of this paper are: math
18
The categories of this paper are: econ