Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Convolutions for Stirling numbers, Lah numbers, and binomial
  coefficients   We present various identities in the form of convolutions involving Stirling
numbers of both kinds, Lah numbers, and binomial coefficients. Certain
convolution polynomials are discussed also. The proofs are based on several
series transformation formulas.

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The categories of this paper are: alg-geom
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The categories of this paper are: adap-org
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The categories of this paper are: acc-phys
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The categories of this paper are: cond-mat
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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: patt-sol
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-th
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The categories of this paper are: stat
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-bio
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The categories of this paper are: atom-ph
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The categories of this paper are: econ
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The categories of this paper are: nucl-ex