Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Vortex stretching and anomalous dissipation for the incompressible 3D
  Navier-Stokes equations   We consider the 3D incompressible Navier-Stokes equations under the following
$2+\frac{1}{2}$-dimensional situation: small-scale horizontal vortex blob being
stretched by large-scale, anti-parallel pairs of vertical vortex tubes. We
prove anomalous dissipation induced by such vortex-stretching.

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The categories of this paper are: quant-ph
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The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
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The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
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The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
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The categories of this paper are: q-fin
3
The categories of this paper are: physics
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The categories of this paper are: stat
26
The categories of this paper are: bayes-an
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The categories of this paper are: ao-sci
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The categories of this paper are: solv-int
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an