Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spiraling of sub-Riemannian geodesics around the Reeb flow in the 3D
  contact case   We consider a closed three-dimensional contact sub-Riemannian manifold. The
objective of this note is to provide a precise description of the
sub-Riemannian geodesics with large initial momenta: we prove that they "spiral
around the Reeb orbits", not only in the phase space but also in the
configuration space. Our analysis is based on a normal form along any Reeb
orbit due to Melrose.

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The categories of this paper are: mtrl-th
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The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
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The categories of this paper are: plasm-ph
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The categories of this paper are: bayes-an
3
The categories of this paper are: physics
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The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
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The categories of this paper are: math-ph
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The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
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The categories of this paper are: hep-ex
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The categories of this paper are: nucl-th