Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Kaluza-Klein cosmology from five-dimensional Lovelock-Cartan theory   We study the Kaluza-Klein dimensional reduction of the Lovelock-Cartan theory
in five-dimensional spacetime, with a compact dimension of $S^1$ topology. We
find cosmological solutions of the Friedmann-Robertson-Walker class in the
reduced spacetime. The torsion and the fields arising from the dimensional
reduction induce a nonvanishing energy-momentum tensor in four dimensions. We
find solutions describing expanding, contracting and bouncing universes. The
model shows a dynamical compactification of the extra dimension in some regions
of the parameter space.

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The categories of this paper are: astro-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: nucl-th
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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: physics
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The categories of this paper are: stat
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: funct-an
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The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
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The categories of this paper are: adap-org
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The categories of this paper are: plasm-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: q-bio