Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Further extensions of the high-temperature expansions for the
  two-dimensional classical XY model on the triangular and the square lattices   The high-temperature expansions for the spin-spin correlation function of the
two-dimensional classical XY (planar rotator) model are extended by two terms,
from order 24 through order 26, in the case of the square lattice, and by five
terms, from order 15 through order 20, in the case of the triangular lattice.
The data are analyzed to improve the current estimates of the critical
parameters of the models.

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The categories of this paper are: econ
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The categories of this paper are: acc-phys
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The categories of this paper are: astro-ph
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The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
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The categories of this paper are: math-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: math
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The categories of this paper are: nlin
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The categories of this paper are: chao-dyn
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The categories of this paper are: patt-sol
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The categories of this paper are: alg-geom
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The categories of this paper are: gr-qc
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The categories of this paper are: quant-ph
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The categories of this paper are: atom-ph