Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anisotropic penetration depth and optical sum rule violation in
  La_(2-x)Sr_xCuO_4   We calculate the doping dependence of the penetration depths and optical sum
rule violation in La_(2-x)Sr_xCuO_4 within the model of hole superconductivity.
In the clean limit the predicted in-plane sum rule violation is larger than the
c-axis one, however in the presence of disorder the latter one becomes very
substantially enhanced.

27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
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
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph