Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On simple arrangements of lines and pseudo-lines in P^2 and R^2 with the
  maximum number of triangles   We give some new advances in the research of the maximum number of triangles
that we may obtain in a simple arrangements of n lines or pseudo-lines.

33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys