Lebesgue's density theorem: Difference between revisions

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"For almost every point x of A the density exists and is equal to 1" is the correct statement of the theorem, "is equal to 0 or 1" is to weak. Apparently there was a contamination with the next line of the article that refers to x in R^n.
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[[Image:Burning Ship Fractal Overview.jpg|thumb|High-quality overview image of the Burning Ship fractal]]
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[[Image:Burning Ship Left.jpg|thumb|High-quality image of the large ship in the left antenna]]
 
The '''Burning Ship [[fractal]]''', first described and created by Michael Michelitsch and [[Otto E. Rössler]] in 1992, is generated by iterating the function:
 
:<math>z_{n+1} = (|\operatorname{Re} \left(z_n\right)|+i|\operatorname{Im} \left(z_n\right)|)^2 + c, \quad z_0=0</math>
 
in the [[complex plane]] <math>\mathbb{C}</math> which will either escape or remain bounded. The difference between this calculation and that for the [[Mandelbrot set]] is that the real and imaginary components are set to their respective absolute values before squaring at each iteration. The mapping is non-analytic because its real and imaginary parts do not obey the [[Cauchy&ndash;Riemann equations]].<ref>Michael Michelitsch and Otto E. Rössler (1992). "The "Burning Ship" and Its Quasi-Julia Sets". In: ''Computers & Graphics'' Vol. 16, No. 4, pp. 435&ndash;438, 1992. Reprinted in [[Clifford A. Pickover]] Ed. (1998). ''Chaos and Fractals: A Computer Graphical Journey &mdash; A 10 Year Compilation of Advanced Research''. Amsterdam, Netherlands: Elsevier. ISBN 0-444-50002-2</ref>
 
{{Gallery
|title=Burning Ship Fractal renderings
|align=center
|height=125
|lines=5
|File:Burning Ship 3e-9.jpg|High-quality deep-zoom image of a small ship in the armada in the left Western antenna of the main ship structure
|File:Burning Ship Deep Zoom 2e-50.jpg|Burning Ship Deep Zoom to 2.3e-50
|File:Burning Ship Fractal.png|The Burning Ship fractal
|File:Burning Ship Fractal Zoom.png|A zoom-in to the lower left of the Burning Ship fractal, showing a "burning ship" and self-similarity to the complete fractal.
|File:Burning Ship Fractal Zoom 2.png|A zoom-in to line on the left of the fractal, showing nested repetition (a different colour scheme is used here).
|File:Burning_Ship_144x.jpg|High quality image of the Burning Ship fractal.
|File:Jentererforetrukket.jpg|The Burning Ship Fractal featured in the 1K intro "JenterErForetrukket" by Youth Uprising; a demoscene production.
}}
 
==See also==
 
* [[Mandelbrot set]]
* [[Julia set]]
* [[Fractal]]
 
==References==
{{reflist}}
 
==External links==
{{commons}}
*[http://www.theory.org/fracdyn/burningship/ About properties and symmetries of the Burning Ship fractal],  featured by Theory.org,
*[http://paulbourke.net/fractals/burnship/ Burning Ship Fractal], Description and C source code.
*[http://www.graphicandfractalworld.com/Me.html Burning Ship with its Mset of higher powers and Julia Sets]
*[http://jet.ro/video_burningship Burningship], Video,
*[http://michelitsch-fractals.webs.com/Michelitsch_Fractals.htm Fractal webpage] includes the first representations and the original paper cited above on the Burning Ship fractal.
*[http://www.fractalforums.com/index.php?action=gallery;sa=view;id=4057 3D representations of the Burning Ship fractal]
[[Category:Fractals]]
 
{{Fractals}}
{{geometry-stub}}

Latest revision as of 18:32, 13 December 2014

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