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	Dandelin biography
		Germinal Dandelin's father, who was an administrator, was French but his mother came from Hainaut, now in Belgium.
		Dandelin's early mathematical influence was Quetelet, who was two years younger than him, and his early interests were in geometry.
		Dandelin has an important theorem on the intersection of a cone and its inscribed sphere with a plane, discovered in 1822, named after him.
	www-history.mcs.st-and.ac.uk /history/Biographies/Dandelin.html (439 words)

	Germinal Pierre Dandelin - Biocrawler (Site not responding. Last check: 2007-10-09)
		Germinal Pierre Dandelin (1794 - 1847) was a mathematician, soldier, and professor of engineering.
		He was born near Paris to a French father and Belgian mother, studying first at Ghent then returning to Paris to study at the École Polytechnique.
		He is the eponym of the Dandelin spheres, of Dandelin's theorem in geometry (for an account of that theorem, see Dandelin spheres), and of the Dandelin-Gräffe numerical method of solution of algebraic equations.
	www.biocrawler.com /encyclopedia/Germinal_Pierre_Dandelin (197 words)

	CalendarHome.com - - Calendar Encyclopedia (Site not responding. Last check: 2007-10-09)
		Germinal Pierre Dandelin (April 12, 1794 - February 15, 1847) was a mathematician, soldier, and professor of engineering.
		He was born near Paris to a French father and Belgian mother, studying first at Ghent then returning to Paris to study at the École Polytechnique.
		O'Connor, John J; Edmund F. Robertson "Germinal Pierre Dandelin".
	encyclopedia.calendarhome.com /cgi-bin/encyclopedia.pl?p=Germinal_Pierre_Dandelin (225 words)

	Germinal Pierre Dandelin - Wikipedia, the free encyclopedia
		Germinal Pierre Dandelin (1794 - 1847) was a mathematician, soldier, and professor of engineering.
		He was born near Paris to a French father and Belgian mother, studying first at Ghent then returning to Paris to study at the École Polytechnique.
		He is the eponym of the Dandelin spheres, of Dandelin's theorem in geometry (for an account of that theorem, see Dandelin spheres), and of the Dandelin-Gräffe numerical method of solution of algebraic equations.
	en.wikipedia.org /wiki/Germinal_Pierre_Dandelin (205 words)

	KöMaL - Rita Kós: Conics and Dandelin spheres
		By intersecting a cone with a plane - not passing through the vertex of the cone -, curves of different types can be obtained, depending on the angle enclosed between the plane and the axis of the cone.
		Germinal Pierre Dandelin (1794-1847) was a French engineer, who lived in Belgium.
		In 1822, he discovered the relation between the intersection curve of the cone with a plane, the foci of the intersecion conics, and the two inscribed spheres touching the cone and the intersecting plane.
	www.komal.hu /cikkek/dandelin/dandelin.e.shtml (225 words)

	Monsieur Dandelin
		I was first introduced to Monsieur Germinal Pierre Dandelin in Math 309, 1997 Spring by Prof.
		Germinal Dandelin (1794-1847) was a mathematician whose career was very much influenced by the political upheavals of his time.
		Essentially, Dandelin employs generators of hyperboloids to establish a concrete relation between the conic section, the cutting plane, and the sides of the hexagon concerned.
	www.cs.ubc.ca /~tzupei/Math/index.html (2165 words)

	KöMaL - Rita Kós: Conics and Dandelin spheres
		By intersecting a cone with a plane - not passing through the vertex of the cone -, curves of different types can be obtained, depending on the angle enclosed between the plane and the axis of the cone.
		Germinal Pierre Dandelin (1794-1847) was a French engineer, who lived in Belgium.
		In 1822, he discovered the relation between the intersection curve of the cone with a plane, the foci of the intersecion conics, and the two inscribed spheres touching the cone and the intersecting plane.
	komal.elte.hu /cikkek/dandelin/dandelin.e.shtml (225 words)

	Germinal Pierre Dandelin article - Germinal Pierre Dandelin École Polytechnique Napoleon Lazare Carnot Belgium ... (Site not responding. Last check: 2007-10-09)
		Germinal Pierre Dandelin article - Germinal Pierre Dandelin École Polytechnique Napoleon Lazare Carnot Belgium Dandelin - What-Means.com
		He was born near Paris, where he studied at the École Polytechnique.
		Germinal Pierre Dandelin article - Germinal Pierre Dandelin definition - what means Germinal Pierre Dandelin
	www.what-means.com /encyclopedia/Germinal_Pierre_Dandelin (202 words)

	Mathe Genie Lexikon Germinal Pierre Dandelin Erklärung Bedeutung und Formel
		Mathe Genie Lexikon Germinal Pierre Dandelin Erklärung Bedeutung und Formel
		Mathematik Begriff Erklärung Germinal Pierre Dandelin Formel Hilfe Hausaufgabeb
		Nach Dandelin sind die Dandelinschen Kugeln benannt: eine bzw.
	www.mathe-genie.de /lexikon_710_Germinal-Pierre-Dandelin.html (117 words)

	Dandelin spheres
		If a cone is sliced through by a plane, the two spheres that just fit inside the cone, one on each side of the plane and both tangent to it and touching the cone, are known as Dandelin spheres.
		They are named after the Belgian mathematician and military engineer Germinal Pierre Dandelin (1794-1847) who gave an elegant proof that the two spheres touch the conic section at its foci.
		In 1826, Dandelin showed that the same result applies to the plane sections of a hyperboloid of revolution.
	www.daviddarling.info /encyclopedia/D/Dandelin_spheres.html (157 words)

	Applet JDandelin (Site not responding. Last check: 2007-10-09)
		In addition it gives you a chance to see and understand the famous Dandelin's proof of the fact that the ellipse parabola and hyperbola are conic sections.
		Germinal Pierre Dandelin was a mathematician of French-Belgium origin.
		In 1822 he introduced his elegant proofs of the fact that ellipse, hyperbola and parabola are produced as an intersection of a cone with a plane.
	www.lostlecture.host.sk /JDandelinEn.htm (1671 words)

	Mathematics at West Point in the Early Twentieth Century
		At the Cavalry School at Moravian Weisskirchen Echols, observed the instructor use a model of the cone to explain Dandelin's proof that a section of a cone is an ellipse.
		Germinal Pierre Dandelin (1794-1847) discovered his proof using spheres in a cone to prove that a plane intersecting a cone is a conic.
		Dandelin was a student at the Ecole Polytechnique and one must wonder how his study of descriptive geometry influenced his discovery of this proof.
	www.dean.usma.edu /math/people/rickey/dms/talks/2004-02-19-Early20th-PASHoM.htm (6354 words)

	Dandelin spheres
		This concept is named in honor of Germinal Pierre Dandelin.
		An ellipse has two Dandelin spheres, both touching the same nappe of the cone.
		A hyperbola has two Dandelin spheres, touching opposite nappes of the cone.
	www.sciencedaily.com /encyclopedia/dandelin_spheres (408 words)

	Special Plane Curves: Conic Sections
		Many later mathematicians have also made contribution to conics, espcially in the development of projective geometry where conics are fundamental objects as circles in Greek geometry.
		Dandelin sphere is a sphere of certain size and position inscribed inside the cone.
		Dandelin sphere relate many properties of the conics to the cone.
	xahlee.org /SpecialPlaneCurves_dir/ConicSections_dir/conicSections.html (1840 words)

	Dandelin spheres at AllExperts
		Each Dandelin sphere touches, but does not cross, both the plane and the cone.
		This concept is named in honor of Germinal Pierre Dandelin.
		The point at which the sphere touches the plane is a focus of the conic section.
	en.allexperts.com /e/d/da/dandelin_spheres.htm (490 words)

	[No title]
		Bonnet +------------------------------------------------------------ Bonnet Bonnet Pierre (1819-1892) +------------------------------------------------------------
		Dandelin +------------------------------------------------------------ Dandelin Dandelin Germinal (1794-1847) +------------------------------------------------------------
		GirardPierre +------------------------------------------------------------ GirardPierre Girard Pierre Simon (1765-1836) +------------------------------------------------------------
	www.math.harvard.edu /~knill/sofia/data/mathematicians.txt (6427 words)

	Dandelin
		Dandelin studied at Ghent, then in 1813 he entered the École Polytechnique in Paris.
		During Napoleon's time back in control of France, Dandelin worked at the Ministry of the Interior under the command of
		He gave a method of approximating the roots of an algebraic equation, now named the Dandelin-
	www.educ.fc.ul.pt /icm/icm2003/icm14/Dandelin.htm (373 words)

	✓ Germinal_Pierre_Dandelin - Psycho-Synthese.de - PsychoSynthese
		Nach Dandelin sind die Dandelinschen Kugeln benannt: eine bzw.
		Dandelin, Germinal Pierre Dandelin, Germinal Pierre Dandelin, Germinal Pierre Dandelin, Germinal Pierre
		en:Germinal Pierre Dandelin fr:Germinal Pierre Dandelin it:Germinal Pierre Dandelin
	psycho-synthese.de /index.php/Germinal_Pierre_Dandelin (986 words)

	12 April History: This Date
		The bloodiest four years in US history begin when Confederate shore batteries under General Pierre G. Beauregard open fire on Union-held Fort Sumter in South Carolina's Charleston Bay.
		Over the next thirty-four hours, fifty Confederate guns and mortars launch over four thousand rounds at the poorly supplied fort, and on 13 April, US Major Robert Anderson, commander of the Union garrison, surrenders.
		1794 (23 germinal an II) Germinal Pierre Dandelin, French Belgian mathematician who died on 15 February 1847.
	h42day.0catch.com /history/h4apr/h4apr12.html (10427 words)

	Mathematician
		1849 Pierre F Verhulst, Belgian mathematician (logistic curve), dies at 44
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	www.brainyhistory.com /topics/m/mathematician.html (1362 words)

	Lebensdaten von Mathematikern (Site not responding. Last check: 2007-10-09)
		de Maupertuis, Pierre Louis Moreau (28.9.1698 - 27.7.1759)
		Dionis du Sejour, Achille Pierre (11.1.1734 - 22.8.1794)
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	www.mathe.tu-freiberg.de /~hebisch/cafe/lebensdaten.html (939 words)

	Stranger Fruit
		Posted on March 24, 2007 12:05 AM • 0 Comments
		March 23rd Births 1638 - Frederik Ruysch, Dutch physician and anatomist 1749 - Pierre Simon de Laplace, French mathematician and astronomer 1754 - Baron Jurij Vega, Slovenian mathematician, physicist, and artillery officer 1769 - William Smith, English cartographer (see above)...
		Posted on March 23, 2007 12:10 AM • 0 Comments
	scienceblogs.com /strangerfruit/history_and_philosophy_often_of_science/index.php?page=3 (913 words)

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