1. Joseph Diaz Gergonne Joseph Diaz Gergonne (1771 1859) Oficial de artilharia franc s e competente professor de matem tica nascido em Nancy, ancien l ve da http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

2. Talbot’s Correspondence:Search The Letters Name search for gergonne joseph Diez 5 documents. 1 TRANSCRIPTION GERGONNEJoseph Diez to TALBOT William Henry Fox http://www.foxtalbot.arts.gla.ac.uk/letters/name.asp?namestring=Gerg&target=372

3. So Biografias Nomes JOSEPH Joseph Bramah Joseph Burr Tyrrell Joseph Conrad Joseph Dalton Hooker Joseph Deniker Joseph Diaz gergonne joseph Edward Murray Joseph Erlanger http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

4. Talbot Correspondence Project: GERGONNE Joseph Diez To TALBOT William Henry Fox, Translate this page Talbot Correspondence gergonne joseph Diez to TALBOT William Henry Fox, 31 May1824 01188, Talbot Correspondence Project, University of Glasgow. http://www.foxtalbot.arts.gla.ac.uk/corresp/01188.asp?target=4

5. Joseph D. Gergonne Joseph D. Gergonne Seite aus einem deutschsprachigen OnlinePhilosophenlexikon. http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

6. References For Gergonne References for the biography of Joseph Gergonne http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

7. Gergonne Biography of Joseph Gergonne (17711859) http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

8. Your Free Jean-Victor Poncelet Art History Online Reference And He also discovered the principle of duality independently of Joseph Gergonne . Categories French mathematicians http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

9. Gergonne Point Essay Essay 2 Gergonne Point by Anita Hoskins and Crystal Martin. The Gergonne Point was discovered by and named after Joseph Diaz Gergonne. http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

10. The Gergonne Point The Gergonne Point, so named after the French mathematician Joseph Gergonne, is the point of concurrency which results from connecting the vertices http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

11. Talbot Correspondence Project GERGONNE Joseph Diez To TALBOT Talbot Correspondence gergonne joseph Diez to TALBOT William Henry Fox, 05580, Talbot Correspondence Project, University of Glasgow http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

12. Talbot's CorrespondenceSearch The Letters 1 TRANSCRIPTION gergonne joseph Diez to TALBOT William Henry Fox Doc No 05580 Collection Fox Talbot Museum / Lacock Abbey http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

13. Gergonne Translate this page gergonne joseph Diez, français, 1771-1859. Soldat à la bataille de Valmy, puisofficier Droite de Gergonne. Nommons a, b et c les points de contact du http://serge.mehl.free.fr/chrono/Gergonne.html

Annales de Gergonne . Initiateur, en ce dernier domaine, de la notion de Poncelet . Également favorable à l'usage de la géométrie analytique, il s'opposera là encore assez sévèrement avec Poncelet adepte d'une géométrie synthétique (basée sur les seules transformations projectives Point de Gergonne Dans un triangle ABC les trois droites (en rouge ci-contre) en bleu ...) sont concourantes. le cercle inscrit dans le triangle ABC est tangent aux trois côtés du triangle en A', B' et C'. son centre est le point de concours des bissectrices. , Ed. Hermann, 1987. Droite de Gergonne Nommons a, b et c les points de contact du triangle abc inscrit dans le triangle ABC. Les bissectrices (Aa), (Bb) et (Cc) sont concourantes en le centre du cercle inscrit (non tracées ci-dessous pour ne pas compliquer la figure) En vertu du théorème de Désargues , les supports des côtés homologues, soit (AB) et (ab), (BC) et (bc), (AC) et (ac), sont respectivement sécants en des points alignés u, v et w définissant ainsi la droite de Gergonne associé au triangle ABC.

14. Nouvelle Page 1 Translate this page 0097-gergonne joseph - Diez 0165-GERHARDT Charles - Frédéric 0254-GERMAINAlexandre - Charles 0387-GERMAIN - MARTIN Henri 0406-GERVAIS Etienne http://www.biu.univ-montp1.fr/academie/Data/Academiciens/IndexAlpha/g.htm

G -GACHON Emile -GACHON Paul -GAILLARD Bernardin - Jean - Joseph - Michel - Marc -GALAVIELLE Léopold -GALLET DE SANTERRE Hubert -GALTIER Gaston -GALZY - BARADUC Jeanne -GARAT Joseph -GARLIN - SOULANDRE Jacques -GASPARD Pierre-Emile -GAUCHER Louis -GAUDIN Léon -GAUFFRE Jules -GAUSSEN Jean -GAUSSEN Jean -GAUTERON Antoine -GAUTIER DU BAYLE Henri -GAY Henri - Félix - François -GAYRAUD Etienne - Magloire -GENESTE Patrick -GENNEVAUX Maurice -GÉRARD Jules -GERGONNE Joseph - Diez -GERHARDT Charles - Frédéric -GERMAIN Alexandre - Charles -GERMAIN - MARTIN Henri -GERVAIS Etienne -GERVAIS François - Louis - Paul -GÈZE Jean - Baptiste -GIDE Charles -GILIS Jean - Louis - Paul - Marie - Antoine -GILIS Louis -GIRARD Edmond -GIRARD Frédéric de -GIRARD Joseph de -GIRAUD Gaston -GIRAUD Marcel -GIRBAL Pierre - Auguste - Anthelme -GIROUX Jean -GIRY Joseph -GLAIZE Antonin -GODARD Marcelin -GODECHOT Marcel -GODRON Dominique - Alexandre -GOLFIN Prosper - Hippolyte -GONDANGE Etienne -GOUAN Antoine -GOUAN Antoine -GOULARD Thomas -GOULARD Thomas -GOUNELLE André -GOURON André -GOURON André -GOURON Marcel -GOURRAIGNE Hugues -GOURRAIGNE Hugues -GRANEL Maurice -GRANEL DE SOLIGNAC François -GRANIER Camille -GRANIER Louis -GRANIER Marius -GRASSET Daniel -GRASSET Joseph -GRASSET Joseph -GRASSET Joseph - Pierre - Antoine -GRASSET Pierre -GRASSET - MOREL Louis -GRASSET - MOREL Pierre -GRAWITZ Charles -GROLLIER Gabriel -GRYNFELTT Edouard -GRYNFELTT Joseph -GUEIT Charles -GUENOUN Lucien -GUERRIER Yves -GUIBAL André -GUIBAL Charles - Raymond -GUIBAL Elie -GUIBAL Jean -GUIBAL Louis -GUIBERT Hermann

15. Gergonne, Joseph-Diaz (1771-1859) -- From Eric Weisstein's World Of Scientific B gergonne, josephDiaz (1771-1859). French mathematician who founded Annales demathématiques in 1810. He argued against Poncelet for superiority of analytic http://scienceworld.wolfram.com/biography/Gergonne.html

Branch of Science Mathematicians Nationality French Gergonne, Joseph-Diaz (1771-1859) French mathematician who founded in 1810. He argued against Poncelet for superiority of analytic geometric methods. Additional biographies: MacTutor (St. Andrews)

16. Joseph D. Gergonne Translate this page joseph D. gergonne Seite aus einem deutschsprachigen Online-Philosophenlexikon. http://www.philosophenlexikon.de/gergonne.htm

Begriffe Abaelard - Ayer Baader - Byron Cabanis - Czezowski Ebbinghaus - Ewald ... Frauen in der Philosophie Diskussion PhilTalk Philosophieforen Andere Lexika PhilLex -Lexikon der Philosophie Lexikon der griechischen Mythologie PhiloThek Bibliothek der Klassiker Zeitschriftenlesesaal Nachschlagewerke Allgemeine Information ... Dokumentenlieferdienste Spiele Philosophisches Galgenraten PhilSearch.de Shops PhiloShop PhiloShirt Service Kontakt Impressum eMail Joseph D. Gergonne (1771 - 1859) Logiker Eulerschen Kreisen in der Syllogistik entsprechen. powered by Uwe Wiedemann

17. Philosophenlexikon.de gergonne, joseph D. Gerhards, Gerhard Germain, Sophie Gerson, Johannes Gerzen, Alexandr Iwanowitsch Geulincx, Arnold http://www.philosophenlexikon.de/index-gg.htm

Begriffe Abaelard - Ayer Baader - Byron Cabanis - Czezowski Ebbinghaus - Ewald ... Frauen in der Philosophie Diskussion PhilTalk Philosophieforen Andere Lexika PhilLex -Lexikon der Philosophie Lexikon der griechischen Mythologie PhiloThek Bibliothek der Klassiker Zeitschriftenlesesaal Nachschlagewerke Allgemeine Information ... Dokumentenlieferdienste Spiele Philosophisches Galgenraten PhilSearch.de Shops PhiloShop PhiloShirt Service Kontakt Impressum eMail Philosophen und Logiker [a] [b] [c] [d] ... [z] G Galenos, Claudius Galilei, Galileo Galitsch, Alexandr Iwanowitsch Galton, Francis ... Gunsun Lun powered by Uwe Wiedemann

18. Gergonne Biography of joseph gergonne (17711859) joseph gergonne s father was anarchitect and also a painter. However, he died when joseph was twelve years old http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Gergonne.html

Joseph Diaz Gergonne Born: 19 June 1771 in Nancy, France Died: 4 May 1859 in Montpellier, France Show birthplace location Previous (Chronologically) Next Biographies Index Previous (Alphabetically) Next Main index Version for printing Joseph Gergonne In 1791 the French Assembly was at a difficult stage trying to stabilise the country following the French Revolution. The Assembly was not helped by the King, Louis XVI, attempting to flee the country in June of that year. After the King was returned to Paris, the Assembly reinforced the frontiers of France by calling for 100,000 volunteers from the National Guard. Gergonne gave his support becoming a captain in the National Guard. In April 1792 France went to war against Austria and Prussia. The French attack was quickly halted and then Prussian forces invaded France. The Assembly called for 100,000 military volunteers and Gergonne joined the French army being assembled to defend Paris against the Prussians. On 20 September 1792 Kellermann led the French forces at Valmy with Gergonne in his army. The French defeated the Prussians in an artillery duel and, following this, the Austrian and Prussian armies retreated from France. Following this great French victory, Gergonne went to Paris where he became a secretary to his uncle. It was a time of much military action, however, and Austria and Prussia were not going to simply accept the defeat at Valmy as the end of the war. By 1793 they were joined by Spain, Piedmont, and Britain. The French forces were soon in trouble, fighting on many different fronts and being defeated everywhere. Gergonne returned to the French army, this time as secretary to the general staff of the Moselle army.

19. References For Gergonne References for the biography of joseph gergonne. MH Otero, josephDiezgergonne (1771-1859) (French), Histoire et philosophie des sciences, http://www-groups.dcs.st-and.ac.uk/~history/References/Gergonne.html

References for Joseph Gergonne Version for printing Biography in Dictionary of Scientific Biography (New York 1970-1990). Books: M H Otero, Joseph-Diez Gergonne (1771-1859) (French), Histoire et philosophie des sciences, Sciences et Techniques en Perspective (Nantes, 1997). Articles: P Baptist, Historische Anmerkungen zu Gergonne - und Nagel - Punkt, Sudhoffs Arch. K Chemla, The background to Gergonne's treatment of duality : spherical trigonometry in the late 18th century, in The history of modern mathematics I (Boston, MA, 1989), 331-359. Rev. Histoire Sci. A Lafon, Gergonne, ses travaux, Rev. Histoire Sci. Appl. S M Stigler, The anonymous Professor Gergonne, Historia Math. S M Stigler, Gergonne's 1815 paper on the design and analysis of polynomial regression experiments, Historia Math. Main index Birthplace Maps Biographies Index History Topics ... Anniversaries for the year JOC/EFR September 2000 School of Mathematics and Statistics University of St Andrews, Scotland The URL of this page is: http://www-history.mcs.st-andrews.ac.uk/References/Gergonne.html

20. Isogons center called the gergonne point, named for joseph gergonne (17711859). This means the Lemoine Point of the gergonne Triangle is the gergonne Point http://www.pballew.net/isogon.html

Isogons and Isogonic Symmetry The word isogon has almost completely been replaced by the word equiangular. It describes a polygon with all angles congruent such as rectangles and the regular polygons . The word comes from the Greek isos for same, and gon for knee or corner. Isogonic is  a related word that describes a type of symmetry between lines, passing through the vertex of an angle, and the angle bisector. In the figure Angle ABC is shown with its bisector BB'. The rays BX and BY are isogonal because they make the same angle with the angle Bisector. We often say that one is the isogonal reflection of the other, but it should be clear that if L2 is the isogonic reflection of L1, then L1 is the isogonic reflection for L2.   Two points on these rays, such as X and Y, are called isogonal points.  If three lines in a triangle are concurrent , then their isogonic lines are also concurrent.  In the figure the Red segments AA', BB', and CC' intersect at Point X.  The three blue rays are the isogonic lines for the three Red Segments, which are reflected about the angle bisectors (dashed rays).  Blue Rays intersect in a single point also, labled X'.  Points X and X' are called isogonal conjugates One famous pair of isogonal conjugates is the orthocenter (intersection of the altitudes) and the circumcenter (center of the circle which circumscribes a triangle). If you draw any triangle and find these two points (lets call them P and Q), then draw the angle bisector from any vertex of the triangle (which we will call AX, you will see that the angles PAX and QAX are congruent.

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

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