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Slices of parameter space for meromorphic maps with two asymptotic values

Published online by Cambridge University Press:  18 October 2021

TAO CHEN
Affiliation:
Department of Mathematics, Engineering and Computer Science, Laguardia Community College, CUNY, 31-10 Thomson Ave. Long Island City, NY 11101, USA (e-mail: tchen@lagcc.cuny.edu)
YUNPING JIANG*
Affiliation:
Department of Mathematics, Queens College of CUNY, Flushing, NY 11367, USA
LINDA KEEN
Affiliation:
Department of Mathematics, CUNY Graduate School, New York, NY 10016, USA (e-mail: LKeen@gc.cuny.edu, linda.keenbrezin@gmail.com)

Abstract

This paper is part of a program to understand the parameter spaces of dynamical systems generated by meromorphic functions with finitely many singular values. We give a full description of the parameter space for a specific family based on the exponential function that has precisely two finite asymptotic values and one attracting fixed point. It represents a step beyond the previous work by Goldberg and Keen [The mapping class group of a generic quadratic rational map and automorphisms of the 2-shift. Invent. Math. 101(2) (1990), 335–372] on degree two rational functions with analogous constraints: two critical values and an attracting fixed point. What is interesting and promising for pushing the general program even further is that, despite the presence of the essential singularity, our new functions exhibit a dynamic structure as similar as one could hope to the rational case, and that the philosophy of the techniques used in the rational case could be adapted.

Type
Original Article
Copyright
© The Author(s), 2021. Published by Cambridge University Press

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