Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Perturbation theory for Lyapunov exponents of an Anderson model on a
  strip   It is proven that the inverse localization length of an Anderson model on a
strip of width $L$ is bounded above by $L/\lambda^2$ for small values of the
coupling constant $\lambda$ of the disordered potential. For this purpose, a
formalism is developed in order to calculate the bottom Lyapunov exponent
associated with random products of large symplectic matrices perturbatively in
the coupling constant of the randomness.

16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph