Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Axisymmetric Gravitational Solutions as Possible Classical Backgrounds
  around Closed String Mass Distributions   By studying singularities in stationary axisymmetric Kerr and Tomimatsu-Sato
solutions with distortion parameter \d = 2, 3, ... in general relativity, we
conclude that these singularities can be regarded as nothing other than closed
string-like circular mass distributions. We use two different regularizations
to identify \d-function type singularities in the energy-momentum tensor for
these solutions, realizing a regulator independent result. This result gives
supporting evidence that these axisymmetric exact solutions may well be the
classical solutions around closed string-like mass distributions, just like
Schwarzschild solution corresponding to a point mass distribution. In other
words, these axisymmetric exact solutions may well provide the classical
backgrounds around closed strings.

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The categories of this paper are: nlin
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The categories of this paper are: math-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: physics
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The categories of this paper are: dg-ga
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-th
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The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: chem-ph
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The categories of this paper are: funct-an
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The categories of this paper are: stat
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The categories of this paper are: cmp-lg
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The categories of this paper are: patt-sol