Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Kahler Cone Substructure   To define a consistent perturbative geometric heterotic compactification the
bundle is required to satisfy a subtle constraint known as ``stability,'' which
depends upon the Kahler form. This dependence upon the Kahler form is highly
nontrivial---the Kahler cone splits into subcones, with a distinct moduli space
of bundles in each subcone---and has long been overlooked by physicists. In
this article we describe this behavior and its physical manifestation.

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The categories of this paper are: comp-gas
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The categories of this paper are: eess
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The categories of this paper are: gr-qc
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The categories of this paper are: q-bio
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The categories of this paper are: ao-sci
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The categories of this paper are: adap-org
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The categories of this paper are: math-ph
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The categories of this paper are: q-fin
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The categories of this paper are: patt-sol
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The categories of this paper are: atom-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: nlin
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-th
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The categories of this paper are: acc-phys
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The categories of this paper are: physics