Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the maximum of a function connected with the Green function of a
  focal boundary value problem   It's proved that a function connected with the Green function of the even
order symmetric focal boundary value problem takes its maximal value on the
diagonal.

25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn