Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effect of a positive cosmological constant on cosmic strings   We study cosmic Nielsen-Olesen strings in space-times with a positive
cosmological constant. For the free cosmic string in a cylindrically symmetric
space-time, we calculate the contribution of the cosmological constant to the
angle deficit, and to the bending of null geodesics. For a cosmic string in a
Schwarzschild-de Sitter space-time, we use Kruskal patches around the inner and
outer horizons to show that a thin string can pierce them.

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The categories of this paper are: eess
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The categories of this paper are: math-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: econ
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The categories of this paper are: q-fin
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The categories of this paper are: acc-phys
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The categories of this paper are: cs
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The categories of this paper are: solv-int
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The categories of this paper are: chem-ph
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The categories of this paper are: adap-org
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The categories of this paper are: nucl-th
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The categories of this paper are: q-alg
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: patt-sol