Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Denjoy type-of argument for quasiperiodically forced circle
  diffeomorphisms   We carry the argument used in the proof of the Theorem of Denjoy over to the
quasiperiodically forced case. Thus we derive that if a system of
quasiperiodically forced circle diffeomorphisms with bounded variation of the
derivative has no invariant graphs with a certain kind of topological
regularity, then the system is topologically transitive.

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The categories of this paper are: physics
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: cs
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The categories of this paper are: econ
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The categories of this paper are: funct-an
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ex
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The categories of this paper are: q-bio
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The categories of this paper are: gr-qc
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The categories of this paper are: nlin
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The categories of this paper are: nucl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: acc-phys
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The categories of this paper are: quant-ph