Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Abelian Calabi-Yau threefolds: N\'eron models and rational points   We study Calabi-Yau threefolds fibered by abelian surfaces, in particular,
their arithmetic properties, e.g., N\'eron models and Zariski density.

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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: mtrl-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: cs
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The categories of this paper are: comp-gas
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-lat
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The categories of this paper are: solv-int
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The categories of this paper are: q-alg
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The categories of this paper are: nucl-ex
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The categories of this paper are: atom-ph
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The categories of this paper are: physics
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The categories of this paper are: quant-ph
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The categories of this paper are: funct-an
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The categories of this paper are: math-ph