Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetic Phases in Dense Quark Matter   In this paper I discuss the magnetic phases of the three-flavor color
superconductor. These phases can take place at different field strengths in a
highly dense quark system. Given that the best natural candidates for the
realization of color superconductivity are the extremely dense cores of neutron
stars, which typically have very large magnetic fields, the magnetic phases
here discussed could have implications for the physics of these compact
objects.

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The categories of this paper are: hep-ex
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The categories of this paper are: solv-int
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The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
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The categories of this paper are: hep-th
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The categories of this paper are: acc-phys
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The categories of this paper are: ao-sci
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The categories of this paper are: alg-geom
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The categories of this paper are: math
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The categories of this paper are: physics
10
The categories of this paper are: q-bio
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The categories of this paper are: math-ph