Dandelin Germinal Pierre Dandelin. Germinal Dandelin s father, who was an administrator,was French but his mother came from Hainaut, now in Belgium. http://www-gap.dcs.st-and.ac.uk/~history/Mathematicians/Dandelin.html
Extractions: Germinal Dandelin In March 1814 the Treaty of Chaumont united Austria, Russia, Prussia and Britain in the aim of defeating Napoleon. When the allied armies arrived near Paris on 30 March 1814, Dandelin was in the opposing French army and was wounded on that day. Napoleon abdicated on 6 April, but in the following year he returned for the 100 days. During Napoleon's time back in control of France, Dandelin worked at the Ministry of the Interior under the command of Carnot . After Napoleon was defeated at Waterloo, Dandelin returned to Belgium. He became a citizen of the Netherlands in 1817. 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. This theorem shows that if a cone is intersected by a plane in a conic , then the foci of the conic are the points where this plane is touched by the spheres inscribed in the cone.
Dandelin Translate this page dandelin germinal Pierre, belge, 1794-1847. Dorigine française, polytechnicien,ingénieur. Il sinstalla à Liège où il prit la nationalité belge. http://www.sciences-en-ligne.com/momo/chronomath/chrono2/Dandelin.html
Dandelin Germinal Pierre Dandelin. Born 12 April 1794 in Le Bourget, FranceDied 15 Feb 1847 in Brussels, Belgium. Show birthplace location http://sfabel.tripod.com/mathematik/database/Dandelin.html
Extractions: Previous (Alphabetically) Next Welcome page Dandelin 's father, who was an administrator, was French but his mother came from Hainaut, now in Belgium. Dandelin studied at Ghent, then in 1813 he entered the Ecole Polytechnique in Paris. However his career was to be very much influenced by the political events of these turbulent times. In 1813 Dandelin had volunteered to fight the British. In March 1814 the Treaty of Chaumont united Austria, Russia, Prussia and Britain in the aim of defeating Napoleon. When the allied armies arrived near Paris on 30 March 1814, Dandelin was in the opposing French army and was wounded on that day. Napoleon abdicated on 6 April, but in the following year he returned for the 100 days. During Napoleon's time back in control of France, Dandelin worked at the Ministry of the Interior under the command of Carnot . After Napoleon was defeated at Waterloo, Dandelin returned to Belgium. He became a citizen of the Netherlands in 1817.
Bollen Van Dandelin 1. De stelling van dandelin germinal Pierre Dandelin (17941847, Le Bourget) werdgeboren in Frankrijk, maar wordt toch beschouwd als Belgisch wiskundige; hij http://www.pandd.demon.nl/dandelin.htm
Extractions: Germinal Pierre Dandelin (1794-1847, Le Bourget) werd geboren in Frankrijk, maar wordt toch beschouwd als Belgisch wiskundige; hij bracht het grootste deel van zijn leven in België door (zijn moeder was Belgische), maar zeker ook omdat hij enige tijd mijnbouwkunde doceerde aan de universiteit van Luik.
Dandelin, Germinal-Pierre (1794-1847) -- From Eric Weisstein's World Of Scientif Engineers. Branch of Science. Mathematicians. Nationality. Belgian. Biography Contributors. Barile. dandelin, germinalPierre (1794-1847) This entry contributed by Margherita Barile Le Colonel germinal-Pierre dandelin." In Sciences Mathématiques et Physiques chez les Belges au commencement du http://scienceworld.wolfram.com/biography/Dandelin.html
Extractions: This entry contributed by Margherita Barile Belgian mathematician and engineer who served in the French and Belgian armies. In the Belgian army, he was in charge of building fortifications. He was only 20 years old when he was awarded the by Lazare Carnot , who at that time was Napoleon's Minister of the Interior. In 1816, Dandelin participated in the construction of two telescopes in Namur. He entered the Royal Academy of Brussels in 1822, thanks to a brilliant geometrical work on the parabolic focal curve, where he presented a new elegant proof of a theorem found by his friend Quetelet, which characterized the foci of conic sections with the points of tangency of what are nowadays known as the Dandelin spheres In a curious paper that he published in 1826, Dandelin transferred the same result to the plane sections of a hyperboloid of revolution, where he also re-demonstrated the theorems of Pascal and Brianchon In 1825, the University of Liège assigned him a professorship for a discipline called "exploitation of mines"; the research in this area took him to Germany and England. Later he taught physics at the University of Namur. His fields of interest ranged from projective geometry and algebra to astronomy and mechanics.
Photo Credits From Eric Weisstein's World Of Scientific Biography dandelin, germinalPierre (1794-1847) http//www.bib.ulb.ac.be/coursmath/bio/dandelin.htmDarboux, Gaston (1842-1917) MacTutor Darwin, Charles (1809-1882 http://scienceworld.wolfram.com/biography/photo-credits.html
Dandelin's Spheres (PRIME) The famous construction of dandelin, from the Platonic Realms Interactive Math Encyclopedia. proof, due to the French/Belgian mathematician germinal dandelin (1794 1847), which shows the equivalence of To show that they are, dandelin peformed an ingenious construction http://www.mathacademy.com/pr/prime/articles/dandelin/index.asp
Extractions: We take the case of an ellipse; the other cases are quite similar. As a conic section, an ellipse is the intersection of a cone and a plane whose angle to the vertical is larger than that of the generator of the cone. That is, it is the curve that results when a plane slices right through one of the nappes of the cone. The standard proof of this fact is straightforward, but we'll content ourselves with noticing that it follows more or less immediately from the symmetry of the situation. Indeed, if we rotate the above figure about its axis of symmetry, we get an immediate extension to the case of a sphere inscribed in a cone:
Biography-center - Letter D doctor.cfm/515.html; dandelin, germinal wwwhistory.mcs.st-and.ac.uk/~history/Mathematicians/dandelin.html;Dandy, Walter Edward www http://www.biography-center.com/d.html
Extractions: random biography ! Any language Arabic Bulgarian Catalan Chinese (Simplified) Chinese (Traditional) Croatian Czech Danish Dutch English Estonian Finnish French German Greek Hebrew Hungarian Icelandic Indonesian Italian Japanese Korean Latvian Lithuanian Norwegian Polish Portuguese Romanian Russian Serbian Slovak Slovenian Spanish Swedish Turkish 492 biographies
Monsieur Dandelin You might also want to preread the English translation of germinal dandelin s Hyperboloidsof Revolution and the Hexagons of Pascal and Brianchon in order http://www.cs.ubc.ca/~tzupei/Math/
Extractions: and his 3D proof of Pascal's Theorem Welcome to my Monsieur Dandelin's page! http://www.adobe.com ). You might also want to pre-read the English translation of Germinal Dandelin's "Hyperboloids of Revolution and the Hexagons of Pascal and Brianchon" in order to make any sense out of the illustrations I made. Short cuts: How did I find out about Monsieur Dandelin and how I reacted to his work I was first introduced to Monsieur Germinal Pierre Dandelin in Math 309, 1997 Spring by Prof. Bill Casselman . We were studying astronomical math and Dandelin's 3D proof of conic sections properties was a perfect sculpture to initiate our interest. The 3D proof involves a cone with one or two spheres inscribed inside and a cutting plane. Depending on the position of the spheres and the cutting plane with respect to the conic section, one can easily comprehend (when one sees the picture) why the sum/difference of the distance between any given point on the conic curve and the two focal points are constant. (If you are interested in reading more about this, please refer to Xah's conic section page Intrigued by Dandelin's unique geometric approach, I got hold of a copy of his papers
Dandelin Biography of germinal P dandelin (17941847) germinal Pierre dandelin. Born 12 April 1794 in Le Bourget, France germinal dandelin's father, who was an administrator, was French but his mother came from Hainaut, now in Belgium http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Dandelin.html
Extractions: Germinal Dandelin In March 1814 the Treaty of Chaumont united Austria, Russia, Prussia and Britain in the aim of defeating Napoleon. When the allied armies arrived near Paris on 30 March 1814, Dandelin was in the opposing French army and was wounded on that day. Napoleon abdicated on 6 April, but in the following year he returned for the 100 days. During Napoleon's time back in control of France, Dandelin worked at the Ministry of the Interior under the command of Carnot . After Napoleon was defeated at Waterloo, Dandelin returned to Belgium. He became a citizen of the Netherlands in 1817. 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. This theorem shows that if a cone is intersected by a plane in a conic , then the foci of the conic are the points where this plane is touched by the spheres inscribed in the cone.
Xah: Special Plane Curves: Conic Sections Among the contributors, we may find Newton, dandelin, Gergonne, Poncelet, Brianchon, Dupin, Chasles, and Steiner It is named after its discoverer germinal Pierre dandelin (1822). http://xahlee.org/SpecialPlaneCurves_dir/ConicSections_dir/conicSections.html
Extractions: Code for above graphics Mathematica Notebook for This Page History Description ... Related Web Sites Appollonius was the first to base the theory of all three conics on sections of one circular cone, right or oblique. He is also the one to give the name ellipse, parabola, and hyperbola. A brief explanation of the naming can be found in Howard Eves, An Introduction to the History of Math. 6th ed. page 172. (also see J.H.Conway's newsgroup message, link at the bottom) In Renaissance, Kepler's law of planetary motion, Descarte and Fermat's coordinate geometry, and the beginning of projective geometry started by Desargues, La Hire, Pascal pushed conics to a high level. 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. Among the contributors, we may find Newton, Dandelin, Gergonne, Poncelet, Brianchon, Dupin, Chasles, and Steiner. Conic sections is a rich classic topic that has spurred many developments in the history of mathematics. Hyperbola ellipse , and parabola are together known as conic sections, or just conics. So called because they are the intersection of a right circular cone and a plane.
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Extractions: 4 Dd d'Abbans, Claude de Jouffroy, designed the first steamship in 1783 Polish writer da Castelfranco, Giorgione , (c. 1477-1510), ( Giorgione Dac, Pierre, humorist and Resistance worker Dach, Simon, (1605-1659), German lyric poet Dacre, Charlotte, (1782-1842), author Dadd, Richard , (1817-1866), painter Daehlie, Bjo/rn, cross-country skier Daei, Ali , (born 1969), professional footballer Daeubler-Gmelin, Herta , (born 1943) Dafoe, Willem , (born 1955), US actor Dakin, Henry Drysdale, (1880-1952), English chemist da Gama, Vasco , (1469?-1524), Portuguese explorer D'Agata, Mario , mute-deaf who became a world boxing champion Dagerman, Stig, Swedish writer Daghlian, Harry K. Jr (1921-1945), "first American casualty of the atomic age" Dagmar, (1921-2001), television personality Dagmar of Denmark d'Aguillon, Francois , (1566-1617), mathematician Dagobert II , (died 638), king of the Franks Dagobert II of Austrasia
References For Dandelin References for the biography of germinal P dandelin References for germinal P dandelin. Biography in Dictionary of Scientific Biography F Cajori, The dandelinGräffe method, in A history of http://www-history.mcs.st-and.ac.uk/References/Dandelin.html
List Of Mathematicians Sweden, 1893 1985). D. Francois d Aguillon (Belgium, 1566 - 1617);germinal Pierre dandelin (France, Belgium, 1794 - 1847); David van http://www.fact-index.com/l/li/list_of_mathematicians.html
Extractions: Main Page See live article Alphabetical index The famous mathematicians are listed below in English alphabetical transliteration order (by surname A B C ... Z Charles Babbage (United Kingdom, John Baez Alan Baker (Britain, Stefan Banach (Poland, Grigory Isaakovich Barenblatt (Russia, USA, Isaac Barrow (England, Thomas Bayes (England, Eric Temple Bell (Scotland, USA, Jakob Bernoulli (Switzerland, Johann Bernoulli (Switzerland, Joseph Louis Francois Bertrand (France, Friedrich Wilhelm Bessel (Germany
Untitled abacus i n. ( pl. href="ref_main.cgi?dandelin 146s Spheres" onMouseOver="changeStatus('JUMP TO dandelin 146S SPHERES 17th century French mathematician germinal dandelin of the equivalence http://www.mathacademy.com/platonic_realms/encyclop/main.txt
Extractions: A horizontal beam separates the frame into an upper deck and a lower deck Abel n. group in which the group operation is commutative n. ordered pair . Compare: ordinate n. Euclidean geometry without the parallel postulate n. real number x , the absolute value of x , denoted abs( x ) or I x I , is defined by I x I = x if x , and I x x if x . Equivalently, the absolute value of x is the distance between x and on the real number line. If z is a complex number , then I z I denotes the modulus of z , which is the distance between z adj. (Of measures:) Given a measurable space X M and two signed measure s m and n on X , then n is said to be absolutely continuous with respect to m , denoted by if for any E in M such that m E we have n E (Of functions:) If f is a function with domain the set of real number s and range the set of complex number s, then f is absolutely continuous if for any positive e there is some d greater than zero such that for any finite set of disjoint interval s we have:
Extractions: Dictionaries: General Computing Medical Legal Encyclopedia Word: Word Starts with Ends with Definition These list of mathematical topics pages collect pointers to all Encyclopedia articles related to mathematics Mathematics is commonly defined as the study of patterns of structure, change, and space; more informally, one might say it is the study of 'figures and numbers'. In the formalist view, it is the investigation of axiomatically defined abstract structures using logic and mathematical notation; other views are described in Philosophy of mathematics. Mathematics might be seen as a simple extension of spoken and written languages, with an extremely precisely defined vocabulary and grammar, for the purpose of describing and exploring physical and conceptual relationships.
Dandelin Translate this page Zurück zur Übersicht Biografien. dandelin, germinal Pierre, belgischerMathematiker * 12. 4. 1794 Le Bourget, 15. 2. 1847 Ixelles. http://www.studienseminare-duesseldorf.nrw.de/sekundI/Seminare/Mathe/Kaleidoskop
Extractions: Arbeitsgebiete: Kegelschnitte Nach Dandelin sind die Dandelinschen Kugeln benannt: eine bzw. zwei Kugeln, die sämtlich Mantellinien eines geraden Kreiskegels und eine Schnittebene in den Brennpunkten des entstehenden Kegelschnitts berühren; die Dandelinschen Kugeln dienen der Herleitung der Eigenschaften von Kegelschnitten.
Editing Germinal Pierre Dandelin - Edit - Wikipedia, The Free Encyclopedia WikipediaRequested articles/Mathematical and Natural Sciences Ronald Coifman WN Colquitt - Edward Condon - James Cooley - Nicolas Courtois- J. Cullen - AJC Cunningham - D germinal Pierre dandelin - GC Danielson http://en.wikipedia.org/w/wiki.phtml?title=Germinal_Pierre_Dandelin&action=edit
