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Elemente der Mathematik
Article . 2014 . Peer-reviewed
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zbMATH Open
Article . 2014
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Limit shape of iterated Kiepert triangles

Authors: Nicollier, Grégoire; Stadler, Albert;

Limit shape of iterated Kiepert triangles

Abstract

The authors consider a discrete dynamical system defined in the following way: Starting with a base triangle \(\Delta_0=ABC\), erect externally on all sides of \(\Delta_0\) similar isosceles triangles with apex angle \(\pi-2\theta_0\). The apices opposite to \(A\), \(B\) and \(C\), say, \(A_1,B_1,C_1\) determine the \textit{Kiepert triangle} \(\Delta_1\). Then iterate the process with \(\Delta_1\) and apex angle \(\pi-\theta_1\) and so on\dots In the paper under review, it is shortly proved that the above construction has an equilateral limit when the apex angles are all equal and nonstraight (this was known). The convergence of the construction is also studied under other choices for the sequence \(\theta_0,\theta_1,\dots\).

Keywords

Difference equations, discrete dynamical system, Elementary problems in Euclidean geometries, Kiepert triangle

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
2
Average
Average
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