Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Efficient Computation of Hyperspherical Bessel Functions   Fast and accurate computations of the power spectrum of cosmic microwave
background fluctuations are essential for comparing current and upcoming data
sets with the large parameter space of viable cosmological models. The most
efficient numerical algorithm for power spectrum calculation, recently
implemented by Seljak and Zaldarriaga, involves integrating sources against
spherical Bessel functions or, in the case of a non-flat universe, analogous
hyperspherical Bessel functions. Evaluation of these special functions usually
dominates the computation time in non-flat spatial geometries. This paper
presents a highly accurate and very fast WKB approximation for computing
hyperspherical Bessel functions which will greatly increase the speed of
microwave background power spectrum computations in open and closed universes.

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The categories of this paper are: mtrl-th
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The categories of this paper are: supr-con
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The categories of this paper are: alg-geom
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The categories of this paper are: chem-ph
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The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
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The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
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The categories of this paper are: plasm-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
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The categories of this paper are: bayes-an
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The categories of this paper are: patt-sol
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The categories of this paper are: q-fin
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The categories of this paper are: adap-org