Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: ``Charge-Dyon" System As The Reduced Oscillator   It is shown, that in the general case the Kustaanheimo-Stiefel transformation
(reduction of $4d$ oscillator on the twistor space by the Hamiltonian action of
$U(1)$ with further time-reparametrization) leads to the integrable system,
describing the interaction of a spinless electrically charged particle with a
dyon .

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The categories of this paper are: chem-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: q-fin
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The categories of this paper are: dg-ga
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The categories of this paper are: q-bio
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The categories of this paper are: acc-phys
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The categories of this paper are: plasm-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: econ
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The categories of this paper are: solv-int
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The categories of this paper are: q-alg
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The categories of this paper are: cs
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The categories of this paper are: supr-con
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The categories of this paper are: alg-geom