Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Form Factors, deformed Knizhnik-Zamolodchikov equations and finite-gap
  integration   We study the limit of asymptotically free massive integrable models in which
the algebra of nonlocal charges turns into affine algebra. The form factors of
fields in that limit are described by KZ equations on level 0. We show the
limit to be connected with finite-gap integration of classical integrable
equations.

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The categories of this paper are: eess
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The categories of this paper are: bayes-an
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The categories of this paper are: astro-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: gr-qc
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The categories of this paper are: q-bio
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The categories of this paper are: adap-org
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The categories of this paper are: atom-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: chem-ph
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: mtrl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: quant-ph
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The categories of this paper are: nlin