Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Loop Variables and Gauge Invariant Interactions in String Theory   We describe a method of writing down the exact interacting gauge invariant
equations for all the modes of the bosonic open string. It is a generalization
of the loop variable approach that was used earlier for the free, and lowest
order interacting cases. The generalization involves, as before, the
introduction of a parameter to label the different strings involved in an
interaction. The interacting string has thus becomes a ``band'' of finite
width. As in the free case, the fields appear to be massless in one higher
dimension. Although a proof of the consistency and gauge invariance to all
orders (and thus of equivalence with string theory) is not yet available,
plausibility arguments are given. We also give some simple illustrations of the
procedure.

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The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
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The categories of this paper are: funct-an
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The categories of this paper are: nlin
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int