Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Averaged Green function and density of states for electrons in a high
  magnetic field and random potential   We consider a model for 2D electrons in a very strong magnetic field (i.e.
projected onto a single Landau level) and a random potential $V$. The
computation of the averaged Green function for this system reduces to
calculating the averaged density of states. We have constructed a computer
algebra program which automatically generates a perturbation expansion in $V$
for these quantities. This is equivalent to computing moments of the density of
states. When $V$ is a sum of Gaussians from Poisson distributed impurities,
each term in the perturbation expansion can be evaluated automatically. We have
done so up to 12th order. The resulting information can be used to reconstruct
the density of states to good precision.

31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
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The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph