Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Selfadjoint realization of boundary-value problems with interior
  singularities   The purpose of this paper is to investigate some spectral properties of
Sturm-Liouville type problems with interior singularities. Some of the
mathematical aspects necessary for developing own technique presented. By
applying this technique we construct some special solutions of the homogeneous
equation and present a formula and the existence conditions of Green's
function. Further based on this results and introducing operator treatment in
adequate Hilbert space we derive the resolvent operator and prove
selfadjointness of the considered problem.

3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas