Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A relation for Gromov-Witten invariants of local Calabi-Yau threefolds   We compute certain open Gromov-Witten invariants for toric Calabi-Yau
threefolds. The proof relies on a relation for ordinary Gromov-Witten
invariants for threefolds under certain birational transformation, and a recent
result of Kwokwai Chan.

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The categories of this paper are: hep-th
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The categories of this paper are: bayes-an
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The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
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The categories of this paper are: alg-geom
19
The categories of this paper are: eess
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The categories of this paper are: dg-ga
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The categories of this paper are: econ
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The categories of this paper are: physics
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The categories of this paper are: q-fin
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The categories of this paper are: funct-an
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The categories of this paper are: gr-qc
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The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: adap-org
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The categories of this paper are: supr-con