Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Low temperature value of the upper critical field Hc2(0) of isotropic
  single band metals   The strong coupling Schossmann-Schachinger theory for the upper critical
field is considered methodically from the user point of view. We check the
accuracy of approximate formulas for the upper critical field. In particular,
we explain in detail as a recently proposed convenient expression (Shulga et
al. cond-mat/0103154) can be justified. The connection of Hc2(0) with the
critical temperature Tc is considered and the similarity with the Allen-Dynes
Tc-formula is shown explicitly.

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The categories of this paper are: physics
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
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The categories of this paper are: math-ph
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
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The categories of this paper are: hep-ph
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The categories of this paper are: math
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The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys