Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Linear Perturbations in Brane Gas Cosmology   We consider the effect of string inhomogeneities on the time dependent
background of Brane Gas Cosmology. We derive the equations governing the linear
perturbations of the dilaton-gravity background in the presence of string
matter sources. We focus on long wavelength fluctuations and find that there
are no instabilities. Thus, the predictions of Brane Gas Cosmology are robust
against the introduction of linear perturbations. In particular, we find that
the stabilization of the extra dimensions (moduli) remains valid in the
presence of dilaton and string perturbations.

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The categories of this paper are: solv-int
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The categories of this paper are: atom-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: mtrl-th
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The categories of this paper are: econ
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The categories of this paper are: nlin
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The categories of this paper are: quant-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-ex
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The categories of this paper are: stat
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The categories of this paper are: physics
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The categories of this paper are: bayes-an
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The categories of this paper are: q-fin
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The categories of this paper are: math
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The categories of this paper are: q-alg