Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The power of multifolds: Folding the algebraic closure of the rational
  numbers   It is well known that the usual Huzita-Hatori axioms for origami enable angle
trisection but not angle quintisection. Using the concept of a multifold, Lang
has achieved quintisection but not arbitrary algebraic numbers. We define the
n-parameter multifold and show how to use one-parameter multifolds to obtain
the algebraic closure of the rational numbers.

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The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
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The categories of this paper are: alg-geom
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The categories of this paper are: acc-phys
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The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
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: atom-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: bayes-an
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The categories of this paper are: q-alg
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The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
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The categories of this paper are: econ
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The categories of this paper are: mtrl-th