Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Three Dimensional N=2 Gauge Theories and Degenerations of Calabi-Yau
  Four-Folds   Three dimensional N=2 gauge theories with arbitrary gauge group and
fundamental flavors are engineered from degenerations of Calabi-Yau four-folds.
We show how Coulomb and Higgs branches emerge in the geometric picture. The
analysis of instanton generated superpotentials unravels interesting aspects of
the five-brane effective action in M theory.

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The categories of this paper are: alg-geom
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The categories of this paper are: plasm-ph
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The categories of this paper are: solv-int
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The categories of this paper are: hep-lat
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The categories of this paper are: q-fin
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The categories of this paper are: comp-gas
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The categories of this paper are: dg-ga
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The categories of this paper are: mtrl-th
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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: econ
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The categories of this paper are: ao-sci
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The categories of this paper are: patt-sol
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The categories of this paper are: eess
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The categories of this paper are: nucl-th
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The categories of this paper are: gr-qc