Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ramanujan sums as supercharacters   The theory of supercharacters, recently developed by Diaconis-Isaacs and
Andre, can be used to derive the fundamental algebraic properties of Ramanujan
sums. This machinery frequently yields one-line proofs of difficult identities
and provides many novel formulas. In addition to exhibiting a new application
of supercharacter theory, this article also serves as a blueprint for future
work since some of the abstract results we develop are applicable in much
greater generality.

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The categories of this paper are: cs
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The categories of this paper are: nlin
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The categories of this paper are: bayes-an
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The categories of this paper are: alg-geom
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The categories of this paper are: econ
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-ph
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The categories of this paper are: funct-an
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The categories of this paper are: comp-gas
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The categories of this paper are: q-bio
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The categories of this paper are: gr-qc
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The categories of this paper are: mtrl-th
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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: adap-org
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The categories of this paper are: eess