Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enrichments over symmetric Picard categories   Categorical rings were introduced by Jibladze and Pirashvili in their paper
"Third Mac Lane cohomology via categorical rings", Journal of Homotopy and
related structures, 2, 2007, 187-216. We call those "2-rings". In these notes
we present basic definitions and results regarding 2-modules. This is work in
progress.

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The categories of this paper are: adap-org
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The categories of this paper are: cs
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The categories of this paper are: acc-phys
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The categories of this paper are: gr-qc
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The categories of this paper are: quant-ph
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The categories of this paper are: bayes-an
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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: astro-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: mtrl-th
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The categories of this paper are: ao-sci
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The categories of this paper are: chem-ph
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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: chao-dyn