Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Note on Poly-Instanton Effects in Type IIB Orientifolds on Calabi-Yau
  Threefolds   The zero mode structure for the generation of poly-instanton corrections for
Euclidian D3-branes wrapping complex surfaces in Type IIB orientifolds with O7-
and O3-planes is analyzed. Working examples of such surfaces and explicit
embeddings into compact Calabi-Yau threefolds are presented, with special
emphasis on geometries capable of realizing the LARGE volume scenario.

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The categories of this paper are: plasm-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: cmp-lg
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The categories of this paper are: dg-ga
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The categories of this paper are: math-ph
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The categories of this paper are: atom-ph
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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: patt-sol
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The categories of this paper are: q-alg
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The categories of this paper are: supr-con
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The categories of this paper are: nucl-th
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The categories of this paper are: chem-ph
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The categories of this paper are: q-fin
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The categories of this paper are: quant-ph
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The categories of this paper are: cs