Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Possibility of the 2D Anderson Transition and Generalized Lyapunov
  Exponents   The possible existence of the Anderson transition in 2D systems without
interaction and spin-orbit effects (such as the usual Anderson model) becomes
recently a subject of controversy in the literature. Comparative analysis of
approaches based on generalized Lyapunov exponents is given, in order to
resolve controversy.

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The categories of this paper are: atom-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: ao-sci
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The categories of this paper are: solv-int
1
The categories of this paper are: cs
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The categories of this paper are: q-fin
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The categories of this paper are: patt-sol
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The categories of this paper are: stat
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-th
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The categories of this paper are: econ
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The categories of this paper are: supr-con
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The categories of this paper are: chao-dyn
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The categories of this paper are: quant-ph
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The categories of this paper are: q-alg
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The categories of this paper are: mtrl-th