Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spinning cylinders in general relativity: a canonical form for the Lewis
  metrics of the Weyl class   In the main article [CQG 38 (2021) 055003], a new "canonical" form for the
Lewis metrics of the Weyl class has been obtained, depending only on three
parameters -- Komar mass and angular momentum per unit length, plus the angle
deficit -- corresponding to a coordinate system fixed to the "distant stars"
and an everywhere timelike Killing vector field. Such form evinces the local
but non-global static character of the spacetime, and striking parallelisms
with the electromagnetic analogue. We discuss here its generality, main
physical features and important limits (the Levi-Civita static cylinder, and
spinning cosmic strings). We contrast it on geometric and physical grounds with
the Kerr spacetime -- as an example of a metric which is locally non-static.

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The categories of this paper are: funct-an
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The categories of this paper are: cmp-lg
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The categories of this paper are: supr-con
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The categories of this paper are: astro-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: econ
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: eess
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The categories of this paper are: stat
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The categories of this paper are: chem-ph
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The categories of this paper are: solv-int
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The categories of this paper are: q-bio
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-lat