Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Head-On Collision of Two Equal Mass Black Holes: Numerical Methods   The head-on collision of two nonrotating axisymmetric equal mass black holes
is treated numerically. We take as initial data the single parameter family of
time-symmetric solutions discovered by Misner which consists of two
Einstein-Rosen bridges that can be placed arbitrarily distant from one another.
A number of problems associated with previous attempts to evolve these data
sets have been overcome. In this article, we discuss our choices for coordinate
systems, gauges, and the numerical algorithms that we have developed to evolve
this system.

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The categories of this paper are: ao-sci
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The categories of this paper are: dg-ga
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The categories of this paper are: nucl-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
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The categories of this paper are: adap-org
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The categories of this paper are: q-fin
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The categories of this paper are: comp-gas
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-ex
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The categories of this paper are: physics
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The categories of this paper are: patt-sol
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The categories of this paper are: nlin
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The categories of this paper are: astro-ph
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The categories of this paper are: nucl-ex