Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Polynomial skew products whose Julia sets have infinitely many
  symmetries   We consider the symmetries of Julia sets of polynomial skew products on C^2,
which are birationally conjugate to rotational products. Our main results give
the classification of the polynomial skew products whose Julia sets have
infinitely many symmetries.

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The categories of this paper are: atom-ph
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The categories of this paper are: nlin
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The categories of this paper are: plasm-ph
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The categories of this paper are: physics
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: chem-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: ao-sci
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The categories of this paper are: gr-qc
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The categories of this paper are: nucl-ex
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The categories of this paper are: alg-geom
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The categories of this paper are: acc-phys
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The categories of this paper are: supr-con
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The categories of this paper are: q-alg