Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Zero Threshold Reactions for Detecting Ultra Low Energy Cosmic Relic
  Neutrinos   Paper withdrawn by author. Theoretical formalism employed is inappropriate to
the problem considered.

9
The categories of this paper are: nlin
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio