Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Rankin-Cohen Deformations and Representation Theory   In this paper, we use the unitary representation theory of $SL_2(\mathbb R)$
to understand the Rankin-Cohen brackets for modular forms. Then we use this
interpretation to study the corresponding deformation problems that Paula
Cohen, Yuri Manin and Don Zagier initiated. Two uniqueness results are
established.

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The categories of this paper are: bayes-an
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The categories of this paper are: gr-qc
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The categories of this paper are: alg-geom
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The categories of this paper are: chao-dyn
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The categories of this paper are: stat
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The categories of this paper are: q-bio
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The categories of this paper are: adap-org
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The categories of this paper are: funct-an
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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: q-alg
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The categories of this paper are: astro-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: dg-ga
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The categories of this paper are: eess
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The categories of this paper are: cmp-lg