Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fejer and Suffridge polynomials in the delayed feedback control theory   A remarkable connection between optimal delayed feedback control (DFC) and
complex polynomial mappings of the unit disc is established. The explicit form
of extremal polynomials turns out to be related with the Fejer polynomials. The
constructed DFC can be used to stabilize cycles of one-dimensional non-linear
discrete systems.

21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph