Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: How to Estimate Energy Lost to Gravitational Waves (revised)   The energy--momentum radiated in gravitational waves by an isolated source is
given by a formula of Bondi. This formula is highly non--local: the
energy--momentum is not given as the integral of a well--defined local density.
It has therefore been unclear whether the Bondi formula can be used to get
information from gravity--wave measurements. In this note, we obtain, from
local knowledge of the radiation field, a lower bound on the Bondi flux.

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The categories of this paper are: math
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The categories of this paper are: hep-lat
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The categories of this paper are: nucl-ex
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The categories of this paper are: nlin
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The categories of this paper are: nucl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: eess
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The categories of this paper are: quant-ph
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The categories of this paper are: math-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: acc-phys
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The categories of this paper are: plasm-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: solv-int
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The categories of this paper are: stat
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The categories of this paper are: comp-gas