Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-BCS pairing in anisotropic strongly correlated electron systems in
  solids   The problem of pairing in anisotropic electron systems possessing patches of
fermion condensate in the vicinity of the van Hove points is analyzed.
Attention is directed to opportunities for the occurrence of non-BCS pairing
correlations between the states belonging to the fermion condensate. It is
shown that the physical emergence of such pairing correlations would
drastically alter the behavior of the single-particle Green function, the
canonical pole of Fermi-liquid theory being replaced by a branch point.

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The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph