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Dynamical properties of shift maps on inverse limits with a set valued function

Published online by Cambridge University Press:  22 September 2016

JUDY KENNEDY  and
VAN NALL
JUDY KENNEDY
Affiliation:
Department of Mathematics, PO Box 10047, Lamar University, Beaumont, TX 77710, USA email kennedy9905@gmail.com
VAN NALL
Affiliation:
Department of Mathematics and Computer Science, University of Richmond, Richmond, VA 23173, USA email vnall@richmond.edu
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Abstract

Set-valued functions from an interval into the closed subsets of an interval arise in various areas of science and mathematical modeling. Research has shown that the dynamics of a single-valued function on a compact space are closely linked to the dynamics of the shift map on the inverse limit with the function as the sole bonding map. For example, it has been shown that with Devaney’s definition of chaos the bonding function is chaotic if and only if the shift map is chaotic. One reason for caring about this connection is that the shift map is a homeomorphism on the inverse limit, and therefore the topological structure of the inverse-limit space must reflect in its richness the dynamics of the shift map. In the set-valued case there may not be a natural definition for chaos since there is not a single well-defined orbit for each point. However, the shift map is a continuous single-valued function so it together with the inverse-limit space form a dynamical system which can be chaotic in any of the usual senses. For the set-valued case we demonstrate with theorems and examples rich topological structure in the inverse limit when the shift map is chaotic (on certain invariant sets). We then connect that chaos to a property of the set-valued function that is a natural generalization of an important chaos producing property of continuous functions.

Type
Original Article
Information
Ergodic Theory and Dynamical Systems , Volume 38 , Issue 4 , June 2018 , pp. 1499 - 1524
Copyright
© Cambridge University Press, 2016 

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