Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonperturbative corrections to 4D string theory effective actions from
  SL(2,Z) duality and supersymmetry   We find the D(-1) and D1-brane instanton contributions to the hypermultiplet
moduli space of type IIB string compactifications on Calabi-Yau threefolds.
These combine with known perturbative and worldsheet instanton corrections into
a single modular invariant function that determines the hypermultiplet
low-energy effective acction.

29
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: stat
0
The categories of this paper are: hep-ph
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The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
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The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
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The categories of this paper are: alg-geom
1
The categories of this paper are: cs
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The categories of this paper are: econ
4
The categories of this paper are: cond-mat
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
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The categories of this paper are: math-ph