Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enumerating triangulations by parallel diagonals   The triangulations of a regular convex polygon are enumerated according to
the number of diagonals parallel to a fixed edge. The enumeration uses the
Shapiro convolution identity, as well as an interpretation of this identity in
terms of triangulations.

0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat