Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: APS Instability and the Topology of the Brane-World   As is well known, classical General Relativity does not constrain the
topology of the spatial sections of our Universe. However, the Brane-World
approach to cosmology might be expected to do so, since in general any
modification of the topology of the brane must be reflected in some
modification of that of the bulk. Assuming the truth of the
Adams-Polchinski-Silverstein conjecture on the instability of
non-supersymmetric AdS orbifolds, evidence for which has recently been
accumulating, we argue that indeed many possible topologies for accelerating
universes can be ruled out because they lead to non-perturbative instabilities.

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The categories of this paper are: nlin
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The categories of this paper are: bayes-an
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The categories of this paper are: alg-geom
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The categories of this paper are: acc-phys
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The categories of this paper are: quant-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: nucl-th
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The categories of this paper are: math-ph
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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: dg-ga
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The categories of this paper are: mtrl-th
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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: solv-int
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The categories of this paper are: patt-sol