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arXiv · 1408.0223

Central Strips of Sibling Leaves in Laminations of the Unit Disk

David J. Cosper·Jeffrey K. Houghton·John C. Mayer·Luka Mernik·Joseph W. Olson
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Abstract

Quadratic laminations of the unit disk were introduced by Thurston as a vehicle for understanding the (connected) Julia sets of quadratic polynomials and the parameter space of quadratic polynomials. The "Central Strip Lemma" plays a key role in Thurston's classification of gaps in quadratic laminations, and in describing the corresponding parameter space. We generalize the notion of {\em Central Strip} to laminations of all degrees $d\ge2$ and prove a Central Strip Lemma for degree $d\ge2$. We conclude with applications of the Central Strip Lemma to {\em identity return polygons} that show it may play a role similar to Thurston's lemma for higher degree laminations.

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David J. Cosper, Jeffrey K. Houghton, John C. Mayer, Luka Mernik, Joseph W. Olson. 2014-08-01. Central Strips of Sibling Leaves in Laminations of the Unit Disk. https://arxiv.org/abs/1408.0223

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