Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Convexity in Greek antiquity   We consider several appearances of the notion of convexity in Greek
antiquity, more specifically in mathematics and optics, in the writings of
Aristotle, and in art. The final version of this article will appear in the
book `Geometry in History', ed. S. G. Dani and A. Papadopoulos, Springer
Verlag, 2019.

9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat
24
The categories of this paper are: dg-ga