Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A New Class of Elliptic Finite-Gap Densities of the Polar Operator and
  Stationary Solutions of the Harry Dym equation   A new family of one- and two-gap elliptic densities of the polar operator has
been constructed by modifying the so-called "higher time approach" to
constructing finite-gap solutions of the Harry Dym equation. Auto-B\"{a}cklund
transformations of the obtained stationary solutions have been constructed and
their properties have been studied.

27
The categories of this paper are: comp-gas
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The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat
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The categories of this paper are: chem-ph
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The categories of this paper are: q-fin
1
The categories of this paper are: cs
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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: stat
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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: plasm-ph
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The categories of this paper are: astro-ph
3
The categories of this paper are: physics
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The categories of this paper are: atom-ph
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The categories of this paper are: acc-phys