Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The non-abelian Born-Infeld action at order F^6   To gain insight into the non-abelian Born-Infeld (NBI) action, we study
coinciding D-branes wrapped on tori, and turn on magnetic fields on their
worldvolume. We then compare predictions for the spectrum of open strings
stretching between these D-branes, from perturbative string theory and from the
effective NBI action. Under some plausible assumptions, we find corrections to
the Str-prescription for the NBI action at order F^6. In the process we give a
way to classify terms in the NBI action that can be written in terms of field
strengths only, in terms of permutation group theory.

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The categories of this paper are: stat
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
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The categories of this paper are: econ
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
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The categories of this paper are: q-bio
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The categories of this paper are: patt-sol
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-alg
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The categories of this paper are: alg-geom
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The categories of this paper are: dg-ga
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The categories of this paper are: atom-ph
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The categories of this paper are: adap-org
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The categories of this paper are: funct-an
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The categories of this paper are: math