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On approximation by Function having a strong Entropy Point

Authors :
J. Pawlak Ryszard
Ewa Korczak-Kubiak
Source :
Tatra Mountains Mathematical Publications. 58:77-89
Publication Year :
2014
Publisher :
Walter de Gruyter GmbH, 2014.

Abstract

The paper deals with approximation of functions from the unit interval into itself by means of functions having strong entropy point. For this purpose we define a family of functions having the fixed point property: ConnC (which is a subfamily of the class Conn introduced in [Korczak-Kubiak. E.. Paw- lak. R.J.: Trajectories, first return limiting notions and rings of H-connected and iteratively H-connected functions. Czechoslovak Math. J. 63 (2013). 679-700]). The main result of the paper Is a theorem saying that for any function ƒ ∈ ConnC and any point x0 ∈ Fix(ƒ) there exists a ring R ⊂ ConnC containing function ƒ and in the intersection of any “graph neighbourhood of ƒ” and “neighbourhood of ƒ in topology of uniform convergence”, one can find functions ξ,Ψ ∈ R having a strong entropy point y0 located close to the point x0 and being a discontinuity point of the function ξ and a continuity point of the function Ψ.

Details

ISSN :
12103195
Volume :
58
Database :
OpenAIRE
Journal :
Tatra Mountains Mathematical Publications
Accession number :
edsair.doi...........c804692b8dd661858962234ed3877bfc
Full Text :
https://doi.org/10.2478/tmmp-2014-0007