Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Period functions associated to real-analytic modular forms   We define L-functions for the class of real-analytic modular forms recently
introduced by F. Brown. We establish their main properties and construct the
analogue of period polynomial in cases of special interest, including those of
modular iterated integrals.

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The categories of this paper are: physics
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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: nucl-th
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The categories of this paper are: q-alg
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The categories of this paper are: hep-lat
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The categories of this paper are: nlin
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The categories of this paper are: quant-ph
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The categories of this paper are: q-fin
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The categories of this paper are: adap-org
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The categories of this paper are: econ
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The categories of this paper are: cond-mat
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: patt-sol