Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Digons and angular derivatives of analytic self-maps of the unit disk   We present a geometric approach to a well-known sharp inequality, due to
Cowen and Pommerenke, about angular derivatives of general univalent self-maps
of the unit disk.

8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
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The categories of this paper are: cond-mat
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
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The categories of this paper are: adap-org