Dynamics of meromorphic functions outside a countable set of essential singularities

M. A. Montes de Oca, Guillermo Sienra, Patricio Domínguez

Publication date: 10 May 2017

Abstract: We consider a class of functions, denoted by K in this paper, which are meromorphic outside a compact and countable set B(f), investigated by A. Bolsch in his thesis in 1997. The set B(f) is the closure of isolated essential singularities. We review main definitions and properties of the Fatou and Julia sets of functions in class K. It is studied the role of B(f) in this context. Following Eremenko it is defined escaping sets and we prove some results related to them. For instance, the dynamics of a function is extended to its singularities using escaping hairs. We give an example of an escaping hair with a wandering singular end point, where the hair is contained in a wandering domain of f in K.

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