Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Invitation to higher local fields, Part I, section 14: Explicit abelian
  extensions of complete discrete valuation fields   This work presents author's explicit methods of constructing abelian
extensions of complete discrete valuation fields. His approach to explicit
equations of a cyclic extension of degree p^n which contains a given cyclic
extension of degree p is explained.

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The categories of this paper are: chem-ph
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
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The categories of this paper are: hep-th
9
The categories of this paper are: nlin
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The categories of this paper are: dg-ga
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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: patt-sol
26
The categories of this paper are: bayes-an
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The categories of this paper are: supr-con
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The categories of this paper are: mtrl-th
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The categories of this paper are: q-alg