Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Kinematics of evaporating black holes   The correspondence principle and causality divide the spacetime of a
macroscopic collapsing mass into three regions: classical, semiclassical, and
ultraviolet. The semiclassical region covers the entire evolution of the black
hole from the macroscopic to the microscopic scale if the latter is reached. It
is shown that the metric in the semiclassical region is expressed purely
kinematically through the Bondi charges. The only quantum calculation needed is
the one of radiation at infinity. The ultraviolet ignorance of semiclassical
theory is irrelevant. The metric with arbitrary Bondi charges is obtained and
studied.

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The categories of this paper are: atom-ph
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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: stat
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The categories of this paper are: solv-int
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The categories of this paper are: quant-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: q-fin
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-ex
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The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: patt-sol