Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On explicit inversion of a subclass of operators with $D$-difference
  kernels and Weyl theory of the corresponding canonical systems   Explicit inversion formulas for a subclass of integral operators with
$D$-difference kernels on a finite interval are obtained. A case of the
positive operators is treated in greater detail. An application to the inverse
problem to recover canonical system from a Weyl function is given.

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The categories of this paper are: stat
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The categories of this paper are: econ
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The categories of this paper are: acc-phys
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The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: comp-gas
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The categories of this paper are: patt-sol
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The categories of this paper are: plasm-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: cs
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The categories of this paper are: q-bio
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The categories of this paper are: solv-int
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The categories of this paper are: atom-ph
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The categories of this paper are: q-alg
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The categories of this paper are: q-fin