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en>Rjwilmsi: /* References */Journal cites, Added 1 doi to a journal cite using AWB (10499)

2014-11-22T18:17:49Z

References: Journal cites, Added 1 doi to a journal cite using AWB (10499)

← Older revision		Revision as of 20:17, 22 November 2014
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	~~[[Image:Superaeg.jpg\|right\|thumb\|Brass superegg by [[Piet Hein (Denmark)\|Piet Hein]].]]~~		The author's name is Andera and she believes it sounds quite great. To perform lacross is something he would never give up. Invoicing is what I do for a residing but I've always needed my own business. Some time ago he selected to live in North Carolina and he doesn't strategy on altering it.<br><br>My web-site - psychic love readings ([http://help.ksu.edu.sa/node/65129 please click the following internet site])
	~~In [[geometry]], a '''superegg''~~' is ~~a [[solid of revolution]] obtained by rotating an elongated [[superellipse\|super-ellipse]] with [[exponentiation\|exponent]] greater than 2 around its longest axis~~. It is ~~a special case of [[superellipsoid\|super-ellipsoid]]~~.

	~~Unlike an [[prolate spheroid\|elongated ellipsoid]], an elongated superegg can stand upright on~~ a ~~flat surface, or on top of another superegg~~.<ref name=gardner>{{cite book \| last=Gardner \| first=Martin \| author-link=Martin Gardner \| chapter=Piet Hein’s Superellipse \| year=1977 \| title=Mathematical Carnival. A New Round-Up of Tantalizers and Puzzles from Scientific American \| location=New York \| publisher=[[Vintage Press]] \| pages=240–254 \| isbn=978-0-394-72349-5}}</ref> This is due to ~~its [[curvature]] being zero at the tips.~~

	The shape was popularized by Danish poet and scientist [[Piet Hein (Denmark)\|Piet Hein]] (1905–1996). Supereggs of various materials, like the one shown, were sold as novelties or "[[executive toy]]s" in ~~the 1960s. A 1-ton superegg made of [[steel]]~~ and ~~[[aluminium]] was placed outside [[Kelvin Hall]] in [[Glasgow]] in 1971,~~ on ~~occasion of a lecture by Piet Hein~~.<~~ref~~>~~[http://www.daviddarling.info/encyclopedia/S/superegg.html "Superegg" in the Internet Encyclopedia of Science]~~<~~/ref~~>

	~~==Mathematical description==~~
	~~The superegg is a super~~-~~ellipsoid whose horizontal cross~~-~~sections are circles. It is defined by the [[implicit function\|implicit equation]]~~
	~~:<math>\left\|\frac{\sqrt{x^2 + y^2}}{r}\right\|^p + \left\|\frac{z}{h}\right\|^p \leq 1</math>~~
	where ''r'' is the horizontal radius at the "equator" (the widest part), and ''h'' is one half of the height. The [[exponent]] ''p'' determines the degree of flattening at the tips and equator. Hein's choice was ''p''=2.5 (~~the same he used for the [[Sergels Torg]] roundabout), and ''r''/''h'' = 3/4.<ref>~~[http://~~www~~.~~matematiksider~~.dk/~~piethein.html Piet Heins Superellipse (in Danish)]<~~/~~ref>~~

	~~The definition can be changed to have a strict equality rather than inequality, this changes~~ the ~~superegg to being a [[surface of revolution~~]~~] rather than a solid.<ref>[[Eric W. Weisstein\|Weisstein, Eric W]]. "Superegg." From MathWorld--A Wolfram Web Resource. http://mathworld.wolfram.com/Superegg.html</ref>~~

	~~==See also==~~
	* [[Egg of Columbus]]
	~~{{Portal bar\|Denmark\|Mathematics\|Toys}}~~

	~~==References==~~
	~~{{Reflist}}~~

	~~[[Category:Algebraic curves]]~~
	~~[[Category:Surfaces]]~~
	~~[[Category:Executive toys]]~~

	~~{{Geometry-stub}}~~

en>Shearonink: Per Article Feedback, providing linkage to Wiktionary

2012-11-27T21:40:25Z

Per Article Feedback, providing linkage to Wiktionary

← Older revision		Revision as of 23:40, 27 November 2012
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	~~I would like to introduce myself to you~~, ~~I am Andrew and my spouse doesn~~'~~t like it at all~~. ~~Kentucky~~ is ~~where I've usually been living~~. ~~She functions as~~ a ~~journey agent but soon she'll be~~ on ~~her own~~. ~~To play lacross~~ is ~~some thing he would~~ by ~~no means give up~~.<br><br>~~my web page;~~ [http://www.~~prograd~~.~~uff~~.br/~~novo/facts~~-~~about~~-~~growing-greater-organic~~-~~garden accurate psychic predictions]~~		[[Image:Superaeg.jpg\|right\|thumb\|Brass superegg by [[Piet Hein (Denmark)\|Piet Hein]].]]
			In [[geometry]], a '''superegg''' is a [[solid of revolution]] obtained by rotating an elongated [[superellipse\|super-ellipse]] with [[exponentiation\|exponent]] greater than 2 around its longest axis. It is a special case of [[superellipsoid\|super-ellipsoid]].

			Unlike an [[prolate spheroid\|elongated ellipsoid]], an elongated superegg can stand upright on a flat surface, or on top of another superegg.<ref name=gardner>{{cite book \| last=Gardner \| first=Martin \| author-link=Martin Gardner \| chapter=Piet Hein’s Superellipse \| year=1977 \| title=Mathematical Carnival. A New Round-Up of Tantalizers and Puzzles from Scientific American \| location=New York \| publisher=[[Vintage Press]] \| pages=240–254 \| isbn=978-0-394-72349-5}}</ref> This is due to its [[curvature]] being zero at the tips.

			The shape was popularized by Danish poet and scientist [[Piet Hein (Denmark)\|Piet Hein]] (1905–1996). Supereggs of various materials, like the one shown, were sold as novelties or "[[executive toy]]s" in the 1960s. A 1-ton superegg made of [[steel]] and [[aluminium]] was placed outside [[Kelvin Hall]] in [[Glasgow]] in 1971, on occasion of a lecture by Piet Hein.<ref>[http://www.daviddarling.info/encyclopedia/S/superegg.html "Superegg" in the Internet Encyclopedia of Science]</ref>

			==Mathematical description==
			The superegg is a super-ellipsoid whose horizontal cross-sections are circles. It is defined by the [[implicit function\|implicit equation]]
			:<math>\left\|\frac{\sqrt{x^2 + y^2}}{r}\right\|^p + \left\|\frac{z}{h}\right\|^p \leq 1</math>
			where ''r'' is the horizontal radius at the "equator" (the widest part), and ''h'' is one half of the height. The [[exponent]] ''p'' determines the degree of flattening at the tips and equator. Hein's choice was ''p''=2.5 (the same he used for the [[Sergels Torg]] roundabout), and ''r''/''h'' = 3/4.<ref>[http://www.matematiksider.dk/piethein.html Piet Heins Superellipse (in Danish)]</ref>

			The definition can be changed to have a strict equality rather than inequality, this changes the superegg to being a [[surface of revolution]] rather than a solid.<ref>[[Eric W. Weisstein\|Weisstein, Eric W]]. "Superegg." From MathWorld--A Wolfram Web Resource. http://mathworld.wolfram.com/Superegg.html</ref>

			==See also==
			* [[Egg of Columbus]]
			{{Portal bar\|Denmark\|Mathematics\|Toys}}

			==References==
			{{Reflist}}

			[[Category:Algebraic curves]]
			[[Category:Surfaces]]
			[[Category:Executive toys]]

			{{Geometry-stub}}

en>AnomieBOT: Dating maintenance tags: {{Unreferenced}}

2012-01-02T02:04:40Z

Dating maintenance tags: {{Unreferenced}}

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I would like to introduce myself to you, I am Andrew and my spouse doesn't like it at all. Kentucky is where I've usually been living. She functions as a journey agent but soon she'll be on her own. To play lacross is some thing he would by no means give up.<br><br>my web page; [http://www.prograd.uff.br/novo/facts-about-growing-greater-organic-garden accurate psychic predictions]