Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On two-point boundary value problems for the Sturm-Liouville operator   In this paper, we study spectral problems for the Sturm-Liouville operator
with arbitrary complexvalued potential q(x) and two-point boundary conditions.
All types of mentioned boundary conditions are considered. We ivestigate in
detail the completeness property and the basis property of the root function
system.

23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
18
The categories of this paper are: econ