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Bulletin of the American Mathematical Society

The Bulletin publishes expository articles on contemporary mathematical research, written in a way that gives insight to mathematicians who may not be experts in the particular topic. The Bulletin also publishes reviews of selected books in mathematics and short articles in the Mathematical Perspectives section, both by invitation only.

ISSN 1088-9485 (online) ISSN 0273-0979 (print)

The 2020 MCQ for Bulletin of the American Mathematical Society is 0.84.

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Bizarre topology is natural in dynamical systems
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by Judy A. Kennedy and James A. Yorke PDF
Bull. Amer. Math. Soc. 32 (1995), 309-316 Request permission

Abstract:

We describe an example of a ${C^{\infty }}$ diffeomorphism on a 7-manifold which has a compact invariant set such that uncountably many of its connected components are pseudocircles. (Any 7-manifold will suffice.) Furthermore, any diffeomorphism which is sufficiently close (in the ${C^1}$ metric) to the constructed map has a similar invariant set, and the dynamics of the map on the invariant set are chaotic.
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Additional Information
  • © Copyright 1995 American Mathematical Society
  • Journal: Bull. Amer. Math. Soc. 32 (1995), 309-316
  • MSC: Primary 58F12; Secondary 54F15, 54F50, 54G15, 58F13
  • DOI: https://doi.org/10.1090/S0273-0979-1995-00599-9
  • MathSciNet review: 1307903