1. 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

Germinal Pierre Dandelin Born: 12 April 1794 in Le Bourget, France Died: 15 Feb 1847 in Brussels, Belgium Click the picture above to see a larger version Show birthplace location Previous (Chronologically) Next Biographies Index Previous (Alphabetically) Next Main index Germinal 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.

2. Dandelin Translate this page dandelin germinal Pierre belge, 1794-1847 D’origine française, polytechnicien,ingénieur. Il s’installa à Liège où il prit la nationalité belge. http://www.sciences-en-ligne.com/momo/chronomath/chrono2/Dandelin.html

DANDELIN Germinal Pierre belge, 1794-1847 Apollonius paraboles Parabole : Pour en savoir plus : sous la direction de Jacques-Louis LIONS - Ed. Didier, 1980. Librairie Hachette, Paris - 1946 - N.B. : l'illustration ci-dessus est extraite de ce livre. Green Rodrigues

3. 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

Germinal Pierre Dandelin Born: 12 April 1794 in Le Bourget, France Died: 15 Feb 1847 in Brussels, Belgium Show birthplace location Previous (Chronologically) Next Biographies Index 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.

4. 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

Bollen van Dandelin Dandelin Ellips Parabool Hyperbool ... Analytische meetkunde 1. De stelling van Dandelin 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's eerste wiskundige belangstelling gold de meetkunde. In 1822 ontdekte hij een belangrijke stelling, naar hem genoemd, over het verband tussen de doorsnede van een vlak en een kegel, en binnen die kegel beschreven bollen, de bollen van Dandelin De stelling van Dandelin en de genoemde bollen worden behandeld in de paragraaf 2 (ellips), paragraaf 3 (parabool) en paragraaf 4 (hyperbool). figuur 1 In figuur 1 is een doorsnede getekend van een kegel met het vlak van tekening T (diagonaalvlak). a is de as van de kegel en b is een beschrijvende. a is de halve tophoek van de kegel. c is de snijlijn van een vlak door O loodrecht op T. Dit vlak maakt met de as van de kegel een hoek

5. Virtual Encyclopedia Of Mathematics giuseppe cunha josé anastácio da cunningham ebenezer curry haskell brooks cusanicholas d'alembert jean le rond dandelin germinal pierre danti egnatio http://www.lacim.uqam.ca/~plouffe/Simon/supermath.html

Super-Index of Biographies of Mathematicians abel niels henrik abraham bar hiyya ha-nasi abraham max abu kamil shuja ibn aslam ibn muhammad ... zygmund antoni This index was automatically generated using a new tagging program written by Simon Plouffe at LaCIM

6. ?2Math? 1.Bernhard Bolzano (17811848). 2.Ampere Ander-Marie (1775-1836).3.?dandelin germinal Pierre (1794-1847). . http://140.128.17.82/s8605059/new_page_2.htm

7. Liste Translate this page Clebsch Alfred Condorcet Antoine Caritat Coriolis Gaspard Gustave Cournot AntoineAugustin Cramer Gabriel Cremona Luigi dandelin germinal Pierre Dedekind http://www.minic.ac.at/ut/mathe/Liste.html

Abel Niels Henrik Abubacer Ibn Tofail Al Chwarismi Mohammed Ibn Musa Alembert Jean le Rond d' Abu Nasr Mohammed Anthemios von Tralles Apianus Petrus Archimedes Avempace Ibn Baddscha Babbage Charles Balmer Johann Jakob Banach Stefan Bernays Paul Bernoulli Jakob Bernoulli Johann Bessel Friedrich Wilhelm Bhaskara Bhaskara Atscharja Bolyai Bolzano Bernhard Boole George Borel Bouguer Pierre Bradwardine Thomas Brianchon Charles Julien Briggs Henry Brouwer Luitzen Egbertus Jan Bruns Heinrich Ernst Joost Cantor Georg Cantor Moritz Constantin Cardano Geronimo Cartan Elie Joseph Cassini Giovanni Domenico Cauchy Augustin Louis Cavalieri Francesco Bonaventura Cayley Arthur Ceva Giovanni Christoffel Elwin Bruno Clairault Alexis-Claude Clebsch Alfred Condorcet Antoine Caritat Coriolis Gaspard Gustave Cournot Antoine Augustin Cramer Gabriel Cremona Luigi Dandelin Germinal Pierre Dedekind Richard De Morgan Augustus Desargues Descartes Dirichlet Peter Gustav Lejeune Euklid Euler Leonhard Fagnano Giulio Cesare Fermat Pierre de Feuerbach Karl Fibonacci Leonardo Finsterwalder Sebastian Fourier Jean Baptiste Joseph Galilei Galileo Galois Gassendi Petrus Carl Friedrich Gegenbauer Leopold Girard Albert Kurt Green George Gregory James Grimaldi Francesco Maria Guldberg Cato Maximilian Guldin Paul Haas Wander Johannes de Haitham Ibn al-Haitham Hamilton Sir William Rowan Harriot Thomas Hawking Stephen William Hayashi Tsuruichi Hesse Ludwig Otto Hilbert David Husserl Edmund Huygens Christiaan Jacobi Carl Gustav Jakob Paul von Jeans Sir James Hopwood Jungius Joachim Kahn Hermann

8. Dandelin, Germinal-Pierre (1794-1847) -- From Eric Weisstein's World Of Scientif dandelin, germinalPierre (1794-1847), This entry contributed byMargherita Barile. Belgian mathematician and engineer who served http://scienceworld.wolfram.com/biography/Dandelin.html

Branch of Science Engineers Branch of Science Mathematicians ... Barile Dandelin, Germinal-Pierre (1794-1847) 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.

9. 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/

Monsieur Dandelin 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. Who is Dandelin? What's Pascal's Theorem? What's Brianchon's Theorem? ... Three basic concepts in Dandelin's hyperboloid model List of illustrations: picture 1 picture 2 picture 3 picture 25 ... More info 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

10. Dandelin germinal Pierre dandelin. Né au Bourget le 12 avril 1794, http://smith.ifrance.com/smith/cours2/bio/dandelin.htm

Germinal Pierre Dandelin Né au Bourget le 12 avril 1794, décédé à Bruxelles le 15 février 1847. Le père de Dandelin, qui était administrateur, était français, mais sa mère était originaire du Hainaut. Dandelin étudia à Gand et, en 1813, il entra à l'Ecole Polytechnique de Paris. Toutefois sa carrière allait être influencée par les événements politiques de cette période troublée. En 1813 Dandelin se porta volontaire pour combattre les Anglais. En mars 1814, le Traité de Chaumont réunit l'Autriche, la Russie, la Prusse et la Grande Bretagne dans le but de battre Napoléon. Quand les forces alliées arrivèrent à proximité de Paris le 30 mars 1814, Dandelin, qui combattait dans l'armée française, fut blessé. Napoléon abdiqua le 6 avril, mais revint l'année suivante pendant la campagne des 100 jours. Pendant le retour de Napoléon en France, Dandelin travailla au ministère de l'Intérieur sous les ordres de Carnot. Après la défaite de Napoléon à Waterloo, Dandelin retourna en Belgique. Il devint citoyen néerlandais en 1817. De retour en Belgique, Dandelin continua sa carrière militaire comme ingénieur. A partir de 1825 il passa cinq ans comme professeur d'exploitation des mines à Liège. Ensuite, en 1830, il fut en plein coeur de la révolution. A partir de 1835, il fut en charge dans l'armée belge des fortifications à Namur, à Liège et plus tard à Bruxelles.

11. Dandelin Biography of germinal P dandelin (17941847) 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

Germinal Pierre Dandelin Born: 12 April 1794 in Le Bourget, France Died: 15 Feb 1847 in Brussels, Belgium Click the picture above to see a larger version Show birthplace location Previous (Chronologically) Next Biographies Index Previous (Alphabetically) Next Main index Germinal 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.

12. References For Dandelin References for germinal P dandelin. Biography in Dictionary of ScientificBiography (New York 19701990). Articles F Cajori, The http://www-gap.dcs.st-and.ac.uk/~history/References/Dandelin.html

References for Germinal P Dandelin Biography in Dictionary of Scientific Biography (New York 1970-1990). Articles: A history of Mathematics (New York, 1938), 364. Amer. Math. Monthly A Quetelet, G P Dandelin, Biographie nationale XIV (Brussels,1873), 663-668. Praxis der Gleichungen (Berlin-Leipzig, 1921), 136-158. Main index Birthplace Maps Biographies Index History Topics ... Anniversaries for the year JOC/EFR February 1997 School of Mathematics and Statistics University of St Andrews, Scotland The URL of this page is: http://www-history.mcs.st-andrews.ac.uk/history/References/Dandelin.html

13. BiosWorld What's New May 2002. May 31, 2002. dandelin, germinalPierre (1794-1847) (NEW); Kovalevskaya,Sofia (1850-1891) (modified); Viète, Francois (1540-1603) (NEW). May 30, 2002. http://scienceworld.wolfram.com/biography/whatsnew.html

14. References For Dandelin References for the biography of germinal P dandelin References for germinal P dandelin. Biography in Dictionary of Scientific Biography (New York 19701990). http://www-history.mcs.st-and.ac.uk/References/Dandelin.html

References for Germinal P Dandelin Biography in Dictionary of Scientific Biography (New York 1970-1990). Articles: A history of Mathematics (New York, 1938), 364. Amer. Math. Monthly A Quetelet, G P Dandelin, Biographie nationale XIV (Brussels,1873), 663-668. Praxis der Gleichungen (Berlin-Leipzig, 1921), 136-158. Main index Birthplace Maps Biographies Index History Topics ... Anniversaries for the year JOC/EFR February 1997 School of Mathematics and Statistics University of St Andrews, Scotland The URL of this page is: http://www-history.mcs.st-andrews.ac.uk/history/References/Dandelin.html

15. Biography-center - Letter D Danbolt, Niels Christian Gauslaa www.whonamedit.com/doctor.cfm/515.html; dandelin,germinal wwwhistory.mcs.st-and.ac.uk/~history/Mathematicians/dandelin.html; http://www.biography-center.com/d.html

Visit a 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 D 456 biographies www-history.mcs.st-and.ac.uk/~history/Mathematicians/Durer.html D'Alema, Massimo www.uwgb.edu/galta/333/BIOS98/DALEMA.HTM d'Alembert, Jean-le-Rond www.treasure-troves.com/bios/dAlembert.html d'Alembert, Jean www-history.mcs.st-and.ac.uk/~history/Mathematicians/D'Alembert.html D'Inzeo, Raimondo www.olympic.org/uk/athletes/heroes/bio_uk.asp?PAR_I_ID=25085 Da Costa, Jacob Mendez www.whonamedit.com/doctor.cfm/2452.html Da Vinci, Leonardo www.ibiblio.org/wm/paint/auth/vinci/ Da Vinci, Leonardo www.kfki.hu/~arthp/bio/l/leonardo/biograph.html Dadd, Richard www.getty.edu/art/collections/bio/a281-1.html Daddi, Bernardo www.kfki.hu/~arthp/bio/d/daddi/biograph.html Daddi, Bernardo www.getty.edu/art/collections/bio/a1085-1.html Dae-jung, Kim

16. Dandelin Portrait germinal P dandelin. JOC/EFR August 2001 http://www-gap.dcs.st-and.ac.uk/~history/PictDisplay/Dandelin.html

Germinal P Dandelin JOC/EFR August 2001 The URL of this page is: http://www-history.mcs.st-andrews.ac.uk/history/PictDisplay/Dandelin.html

17. KöMaL - Kós Rita: Kúpszeletek és Dandelin-gömbjeik egy pontban metszik egymást. germinal Pierre dandelin (17941847).Belgiumban élo francia mérnök volt. Tole származik az a http://www.komal.hu/cikkek/dandelin/tortenelem.h.shtml

Rendelje meg a KöMaL-t! Kúpszelet-történelem A kúpszeletek kb. 2350 éves történelmében sok ismert névvel találkozhatunk. Róluk (is) olvashatunk a következõkben. Menaikhmosz (i.e. 350 körül) Eukleidesz (i.e. 365?-300?) Szürakuszai Arkhimédész (i.e. 287-212) Pergei Apolloniosz (i.e. 260-190) ... Bolyai János (1802-1860) Menaikhmosz (i.e. 350 körül) A híres matematikus, Eudoxosz (i.e. 400?-347?) volt a mestere. Testvére, Deinosztratosz a kör négyszögesítésével örökítette meg nevét. Menaikhmosz egy másik híres problémával foglalkozott: a kockakettõzéssel. Másodállásban Nagy Sándor egyik nevelõje volt. Proklosz szerint Menaikhmosz jelentõsen továbbfejlesztette a geometriát, munkái azonban nem maradtak fenn, így ,,csak'' a kúpszeletek felfedezését tudhatjuk övének. A forgáskúpokat nyílásszögük alapján három csoportra osztotta: tompaszögû, derékszögû és hegyesszögû kúpokra. Mindegyiket olyan síkkal metszette, ami merõleges valamelyik alkotóra. Így nyerte sorban a hiperbola, parabola, ellipszis síkmetszeteket. Ezeknek a nevét is a kúpok után hegyesszögû, derékszögû és tompaszögû kúp síkmetszetének nevezte. Ennek a három kúpszeletnek néhány tulajdonságát, sõt a szümptómáját, azaz ,,egyenletét'' is meghatározta. Eukleidesz (i.e. 365?-300?)

18. KöMaL - Rita Kós: Conics And Dandelin Spheres His proof will be demonstrated below. germinal Pierre dandelin (17941847)was a French engineer, who lived in Belgium. In 1822, he http://www.komal.hu/cikkek/dandelin/dandelin.e.shtml

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. If the angle is equal to the half of the apex angle of the cone, the intersection curve is a parabola ; if it is smaller than the half-angle, then the intersection is a hyperbola; if the angle is greater than the half-angle, then the curve is an ellipse ; and finally, if the plane is perpendicular to the axis, then the intersection is a circle The curves listed above can also be considered as the loci of points of certain properties. The parabola is the locus of those points in the plane that are equidistant from a fixed point, called the focus , and a fixed straight line, called the directrix. The ellipse is the locus of those points in the plane for which the sum of the distances from two given points - the so-called foci - is constant. The hyperbola is the locus of those points in the plane for which the difference between the distances from two given points - the so-called foci - is constant.

19. 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

Zurück zur Übersicht Biografien Dandelin , Germinal Pierre, belgischer Mathematiker 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.

20. Untitled dandelin, germinal Pierre. 12 Apr 1794 15 Feb 1847. Belgium, bornin France. He was wounded in action in both 1814 and 1815. He worked http://www.stg.brown.edu/projects/projects.old/classes/ma8/Dandelin/Dandelinbio.

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