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Bifurcations of dynamic rays in complex polynomials of degree two

Published online by Cambridge University Press:  19 September 2008

Pau Atela
Pau Atela
Affiliation:
Program in Applied Mathematics, University of Colorado, Boulder, CO 80309-526, USA
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Abstract

In the study of bifurcations of the family of degree-two complex polynomials, attention has been given mainly to parameter values within the Mandelbrot set M (e.g., connectedness of the Julia set and period doubling). The reason for this is that outside M, the Julia set is at all times a hyperbolic Cantor set. In this paper weconsider precisely this, values of the parameter in the complement of M. We find bifurcations occurring not on the Julia set itself but on the dynamic rays landing on itfrom infinity. As the parameter crosses the external rays of M, in the dynamic plane the points of the Julia set gain and lose dynamic rays. We describe these bifurcations with the aid of a family of circle maps and we study in detail the case of the fixed points.

Type
Research Article
Information
Ergodic Theory and Dynamical Systems , Volume 12 , Issue 3 , September 1992 , pp. 401 - 423
Copyright
Copyright © Cambridge University Press 1992

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