Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Tentative Modeling Study of the Effect of Wall Reactions on Oxidation
  Phenomena   This paper gives details of a tentative modeling study that investigates the
inhibiting effect of internal reactor walls treated with acid...

17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math