Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Factorization and generalized *-products   The generalized *-products, or the $*_N$-products, appear both in the
one-loop effective action of noncommutative Yang-Mills theories and in the
coupling of a closed string to N open strings on a disk when the D-brane
world-volume is noncommutative. Factorization of the string amplitudes provides
a uniform understanding of the $*_N$-products and a hint to obtain a simple,
explicit formula (in the momentum space) for arbitrary N in the non-Abelian
case. Possible extension to a more general ${}_M *_{N}$-product in the M-loop
context is discussed.

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The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
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The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
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The categories of this paper are: solv-int
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
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The categories of this paper are: cmp-lg
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The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics