Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A variable coefficient multi-frequency lemma   We show a variable coefficient version of Bourgain's multi-frequency lemma.
It can be used to obtain major arc estimates for a discrete Stein--Wainger type
operator considered by Krause arXiv:1803.09431 and Roos arXiv:1907.00405.

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The categories of this paper are: alg-geom
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-th
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The categories of this paper are: solv-int
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The categories of this paper are: quant-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: q-alg
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The categories of this paper are: q-bio
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The categories of this paper are: supr-con
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The categories of this paper are: cmp-lg
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The categories of this paper are: stat
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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: q-fin
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The categories of this paper are: eess