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Adding machines, kneading maps, and endpoints
Authors:Lori Alvin  Karen Brucks
Institution:Department of Mathematical Sciences, University of Wisconsin at Milwaukee, Milwaukee, WI 53201-0413, United States
Abstract:Given a unimodal map f, let I=c2,c1] denote the core and set E={(x0,x1,…)∈(I,f)|xiω(c,f) for all iN}. It is known that there exist strange adding machines embedded in symmetric tent maps f such that the collection of endpoints of (I,f) is a proper subset of E and such that limk→∞Q(k)≠∞, where Q(k) is the kneading map.We use the partition structure of an adding machine to provide a sufficient condition for x to be an endpoint of (I,f) in the case of an embedded adding machine. We then show there exist strange adding machines embedded in symmetric tent maps for which the collection of endpoints of (I,f) is precisely E. Examples of this behavior are provided where limk→∞Q(k) does and does not equal infinity, and in the case where limk→∞Q(k)=∞, the collection of endpoints of (I,f) is always E.
Keywords:54H20  37B45  37E05
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