Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New Formulation of the First Law of Black Hole Thermodynamics: A Stringy
  Analogy   We consider the first laws of thermodynamics for a pair of systems made up of
the two horizons of a Kerr-Newman black hole. These two systems are constructed
in such a way that we only demand their ``horizon areas'' to be the sum and
difference of that of the outer and inner horizons of their prototype.
Remarkably, these two copies bear a striking resemblance to the right- and
left-movers in string theory and D-brane physics. Our reformulation of the
first law of black hole thermodynamics can be thought of as an analogy of
thermodynamics of effective string or D-brane models.

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The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
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The categories of this paper are: eess
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The categories of this paper are: funct-an
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The categories of this paper are: patt-sol
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The categories of this paper are: nlin
2
The categories of this paper are: math
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The categories of this paper are: comp-gas
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The categories of this paper are: astro-ph
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The categories of this paper are: q-fin
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The categories of this paper are: solv-int
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The categories of this paper are: chem-ph
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The categories of this paper are: atom-ph