Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An Infinite Number of Closed FLRW Universes for Any Value of the Spatial
  Curvature   The Friedman-Lemaitre-Robertson-Walker (FLRW) cosmological models are based
on the assumptions of large-scale homogeneity and isotropy of the distribution
of matter and energy. They are usually taken to have spatial sections that are
simply connected; they have finite volume in the positive curvature case, and
infinite volume in the null and negative curvature ones. I want to call the
attention to the existence of an infinite number of models, which are based on
these same metrics, but have compact, finite volume, multiply connected spatial
sections. Some observational implications are briefly mentioned.

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The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
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The categories of this paper are: math
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The categories of this paper are: hep-lat
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The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
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The categories of this paper are: bayes-an
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The categories of this paper are: econ
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The categories of this paper are: hep-ex
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The categories of this paper are: eess
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The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: adap-org
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The categories of this paper are: cond-mat
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The categories of this paper are: physics