Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Deficit of Ultrahigh Energy Extensive Air Showers   Arrival directions of extensive air showers by using world data are
considered. It is shown that distributions of showers in zenith angle at
E>10^{19}eV and E>4.10^{19}eV differ from each other. On this basis the
conclusions are made: the estimation of the energy of inclined showers at
E>4.10^{19}eV at Yakutsk and AGASA arrays is incorrect; the cosmic ray spectrum
is not break up and most likely continued up to E=10^{20}eV and higher. It is
found that ultrahigh energy cosmic rays are, probably, superheavy nuclei.

29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph