Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An image processing of a Raphael's portrait of Leonardo   In one of his paintings, the School of Athens, Raphael is depicting Leonardo
da Vinci as the philosopher Plato. Some image processing tools can help us in
comparing this portrait with two Leonardo's portraits, considered as
self-portraits.

9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
2
The categories of this paper are: math