Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spectral Covers, Charged Matter and Bundle Cohomology   We consider four dimensional heterotic compactifications on smooth elliptic
Calabi-Yau threefolds. Using spectral cover techniques, we study bundle
cohomology groups corresponding to charged matter multiplets. The analysis
shows that in generic situations, the resulting charged matter spectrum is
stable under deformations of the vector bundle.

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The categories of this paper are: nucl-ex
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The categories of this paper are: bayes-an
1
The categories of this paper are: cs
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The categories of this paper are: ao-sci
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The categories of this paper are: funct-an
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The categories of this paper are: adap-org
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The categories of this paper are: q-fin
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The categories of this paper are: chem-ph
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The categories of this paper are: nlin
2
The categories of this paper are: math
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The categories of this paper are: plasm-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: patt-sol
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The categories of this paper are: solv-int
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The categories of this paper are: mtrl-th
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The categories of this paper are: eess