Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Spontaneous Compactification of the Closed Bosonic String   We argue that the higher space-time derivative terms that occur in closed
bosonic string field theory are reminiscent of those found in the Landau theory
of liquid-crystal transitions. We examine the lowest level approximation of the
closed bosonic string and find evidence for the existence of a new vacuum that
spontaneously breaks Lorentz and translation symmetries. This effect can be
interpreted as a spontaneous compactification of the theory.

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The categories of this paper are: econ
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The categories of this paper are: hep-lat
3
The categories of this paper are: physics
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
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The categories of this paper are: eess
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The categories of this paper are: solv-int
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The categories of this paper are: q-bio
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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: plasm-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: bayes-an
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The categories of this paper are: atom-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: alg-geom