Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Critical Temperature of an Anisotropic Superconductor in the
  Presence of a Homogeneous Magnetic Field and Impurities   The effect of a homogeneous magnetic field and nonmagnetic impurities on the
critical temperature of an anisotropic superconductor has been investigated.
The role of these pair-breakers in relation to the anisotropy of the order
parameter is clarified.

37
The categories of this paper are: supr-con
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
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
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess