Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On $H_3(1)$ Hankel determinant for some classes of univalent functions   Focus in this paper is on the Hankel determinant, $H_3(1)$, for the
well-known classes of bounded-turning, starlike and convex functions in the
open unit disk $E=\{z\in \mathbb{C}\colon|z|<1\}$. The results obtained
complete the series of research works in the search for sharp upper bounds on
$H_3(1)$ for each of these classes.

6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
18
The categories of this paper are: econ
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con