Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: PP-Waves, M-Theory and Fluxes   We study a new type of warped compactifications of M-theory on eight
manifolds for which nowhere vanishing covariantly constant spinors of
indefinite chirality on the internal manifold can be found. We derive the
constraints on the fluxes and the warp factor following from supersymmetry and
the equations of motion. We show, that the lift of Type IIB PP-waves to
M-theory is a special type of solution of this general class of models. We
comment on the relation between the Type IIB version of such compactifications
as a dual description of the Polchinski-Strassler solution describing a
four-dimensional confining gauge theory.

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The categories of this paper are: math
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The categories of this paper are: q-alg
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The categories of this paper are: hep-lat
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The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: math-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: econ
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The categories of this paper are: dg-ga
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The categories of this paper are: eess
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The categories of this paper are: quant-ph
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The categories of this paper are: q-fin
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The categories of this paper are: solv-int
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The categories of this paper are: cond-mat
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The categories of this paper are: nlin
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The categories of this paper are: cs