Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cosmic Rays with Energy Above 10^{17} ev   The energy spectrum of primary cosmic rays with ultra high energies based on
the Yakutsk EAS Array data is presented. For the largest events values of S600
and axis coordinates have been obtained using revised lateral distribution
function. The affect of the arrival time distribution at several axis distance
on estimated density for Yakutsk and AGASA is considered.

10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
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The categories of this paper are: eess
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
2
The categories of this paper are: math