Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Harmonic polynomials for expanding the fluctuations of the Cosmic
  Microwave Background: The Poincare and the 3-sphere model   Fluctuations of the Cosmic Microwave Background CMB are observed by the WMAP.
When expanded into the harmonic eigenmodes of the space part of a cosmological
model, they provide insight into the large-scale topology of space. All
harmonic polynomials on the multiply connected dodecahedral Poincare space are
constructed. Strong and specific selection rules are given by comparing the
polynomials to those on the 3-sphere, its simply connected cover.

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The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
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The categories of this paper are: econ
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
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The categories of this paper are: bayes-an
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The categories of this paper are: nlin
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The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
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The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg