Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The intermediate problem for binary black hole inspiral and the periodic
  standing wave approximation   In calculations of the inspiral of binary black holes an intermediate
approximation is needed that can bridge the post-Newtonian methods of the early
inspiral and the numerical relativity computations of the final plunge. We
describe here the periodic standing wave approximation: A numerical solution is
found to the problem of a periodic rotating binary with helically symmetric
standing wave fields, and from this solution an approximation is extracted for
the physically relevant problem of inspiral with outgoing waves. The
approximation underlying this approach has been recently confirmed with
innovative numerical methods applied to nonlinear model problems.

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The categories of this paper are: cs
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The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
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The categories of this paper are: physics
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
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The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
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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: econ
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The categories of this paper are: hep-lat
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The categories of this paper are: q-fin
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The categories of this paper are: eess
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The categories of this paper are: math
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The categories of this paper are: hep-ex