Instruct: Identify the main and secondary category of Arxiv papers based on the titles
Query: Definability lattice for addition of rationals   In the present paper we discuss the lattice of reducts of $\langle
\mathbb{Q}, \{$+$\} \rangle$

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The categories of this paper are: plasm-ph
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The categories of this paper are: eess
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The categories of this paper are: comp-gas
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The categories of this paper are: quant-ph
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The categories of this paper are: ao-sci
1
The categories of this paper are: cs
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The categories of this paper are: gr-qc
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The categories of this paper are: q-fin
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The categories of this paper are: nlin
28
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: solv-int
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The categories of this paper are: hep-th
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The categories of this paper are: adap-org
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The categories of this paper are: nucl-ex
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The categories of this paper are: supr-con