Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Confinement, Turbulence and Diffraction Catastrophes   Many features of large N_c transition that occurs in the spectral density of
Wilson loops as a function of loop area (observed recently in numerical
simulations of Yang-Mills theory by Narayanan and Neuberger) can be captured by
a simple Burgers equation used to model turbulence. Spectral shock waves that
precede this asymptotic limit exhibit universal scaling with N_c, with indices
that can be related to Berry indices for diffraction catastrophes.

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The categories of this paper are: atom-ph
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The categories of this paper are: solv-int
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The categories of this paper are: adap-org
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The categories of this paper are: chem-ph
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The categories of this paper are: q-fin
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The categories of this paper are: econ
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The categories of this paper are: physics
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The categories of this paper are: q-alg
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The categories of this paper are: quant-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: nucl-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: astro-ph
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The categories of this paper are: math
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-ph