Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Normally Hyperbolic Circle Foliations   In 1976 D. Sullivan gave an example of a flow on a compact manifold such that
each one of its orbits is a circle and with the surprising property that there
is no finite upper bound for their length. The aim of this article is to show
that these type of examples do not appear as normally hyperbolic foliations.
Namely, we prove that if a circle foliation is the center foliation of a
(dynamically coherent) partially hyperbolic diffeormophism, then there is a
finite upper bound for the length of the leaves. We also give short proofs of
some dynamical consequences in the converse case: if the center foliation of a
partially hyperbolic diffeomorphism $f$ is by compact leaves with uniformly
bounded volume, then $f$ is dynamically coherent and plaque expansive.

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The categories of this paper are: hep-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: atom-ph
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The categories of this paper are: math-ph
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The categories of this paper are: q-alg
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The categories of this paper are: funct-an
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The categories of this paper are: cs
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The categories of this paper are: acc-phys
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The categories of this paper are: chao-dyn
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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: patt-sol
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The categories of this paper are: chem-ph
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The categories of this paper are: econ
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The categories of this paper are: q-fin