Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A cosmological model in Weyl-Cartan spacetime: I. Field equations and
  solutions   In this first article of a series on alternative cosmological models we
present an extended version of a cosmological model in Weyl-Cartan spacetime.
The new model can be viewed as a generalization of a model developed earlier
jointly with Tresguerres. Within this model the non-Riemannian quantities, i.e.
torsion $T^{\alpha}$ and nonmetricity $Q_{\alpha \beta}$, are proportional to
the Weyl 1-form. The hypermomentum $\Delta_{\alpha \beta}$ depends on our
ansatz for the nonmetricity and vice versa. We derive the explicit form of the
field equations for different cases and provide solutions for a broad class of
parameters. We demonstrate that it is possible to construct models in which the
non-Riemannian quantities die out with time. We show how our model fits into
the more general framework of metric-affine gravity (MAG).

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The categories of this paper are: q-bio
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The categories of this paper are: cmp-lg
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The categories of this paper are: eess
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The categories of this paper are: cs
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The categories of this paper are: bayes-an
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The categories of this paper are: physics
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The categories of this paper are: hep-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-lat
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The categories of this paper are: acc-phys
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The categories of this paper are: nucl-th
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The categories of this paper are: cond-mat
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The categories of this paper are: astro-ph
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The categories of this paper are: q-alg
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The categories of this paper are: ao-sci
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The categories of this paper are: econ