Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Many-Body Theory of Dilute Bose-Einstein Condensates with Internal
  Degrees of Freedom   The Bogoliubov theory of weakly interacting bosons is generalized to
Bose-Einstein condensates with internal degrees of freedom so that a single
effective Hamiltonian produces various many-body ground states or metastable
spin domains and the corresponding collective modes on an equal footing.

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The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
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The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
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The categories of this paper are: plasm-ph
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The categories of this paper are: eess
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The categories of this paper are: q-alg
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The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex