Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Brane cosmology with a bulk scalar field   We consider ``cosmologically symmetric'' (i.e. solutions with homogeneity and
isotropy along three spatial dimensions) five-dimensional spacetimes with a
scalar field and a three-brane representing our universe. We write Einstein's
equations in a conformal gauge, using light-cone coordinates. We obtain
explicit solutions: a. assuming proportionality between the scalar field and
the logarithm of the (bulk) scale factor; b. assuming separable solutions. We
then discuss the cosmology in the brane nduced by these solutions.

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The categories of this paper are: funct-an
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The categories of this paper are: cond-mat
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The categories of this paper are: math-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: nucl-th
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The categories of this paper are: physics
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The categories of this paper are: adap-org
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The categories of this paper are: comp-gas
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The categories of this paper are: supr-con
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The categories of this paper are: econ
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The categories of this paper are: q-bio
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The categories of this paper are: hep-lat
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The categories of this paper are: alg-geom
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The categories of this paper are: eess
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The categories of this paper are: bayes-an
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The categories of this paper are: patt-sol