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2021-05

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Stable components in the parameter plane of transcendental functions of finite type

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https://doi.org/10.1007/s12220-020-00458-3

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We study the parameter planes of certain one-dimensional, dynamically-de ned slices of holomorphic families of entire and meromorphic transcendental maps of nite type. Our planes are de ned by constraining the orbits of all but one of the singular values, and leaving free one asymptotic value. We study the structure of the regions of parameters, which we call shell components, for which the free asymptotic value tends to an attracting cycle of non-constant multiplier. The exponential and the tangent families are examples that have been studied in detail, and the hyperbolic components in those parameter planes are shell components. Our results apply to slices of both entire and meromorphic maps. We prove that shell components are simply connected, have a locally connected boundary and have no center, i.e., no parameter value for which the cycle is superattracting. Instead, there is a unique parameter in the boundary, the virtual center, which plays the same role. For entire slices, the virtual center is always at in nity, while for meromorphic ones it maybe nite or in nite. In the dynamical plane we prove, among other results, that the basins of attraction which contain only one asymptotic value and no critical points are simply connected. Our dynamical plane results apply without the restriction of nite type.

Matèries

Sistemes dinàmics diferenciables, Funcions de variables complexes

Matèries (anglès)

Differentiable dynamical systems, Functions of complex variables

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Articles publicats en revistes (Matemàtiques i Informàtica)

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FAGELLA RABIONET, Núria, KEEN, Linda. Stable components in the parameter plane of transcendental functions of finite type. _Journal of Geometric Analysis_. 2021. Vol. 31, núm. 5, pàgs. 4816-4855. [consulta: 24 de gener de 2026]. ISSN: 1050-6926. [Disponible a: https://hdl.handle.net/2445/183655]

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