Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Model of a hypothetical high-temperature superconductor   We propose a model of a hypothetical superconductor which includes impurities
with retarded interaction with quasiparticle and superconducting matrix where
these impurity can be applied with large concentration. Interaction between the
impurity and a conduction electron in such a system has been calculated. We
have found the critical temperature of the system matrix+impurity essentially
exceeds critical temperature of the pure superconducting matrix.

8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
19
The categories of this paper are: eess