21. De Morgan, Augustus de morgan, augustus (18061871). British mathematician who initiated anddeveloped a theory of relations in logic. He devised a symbolism http://www.cartage.org.lb/en/themes/Biographies/MainBiographies/D/DeMorgan/1.htm

De Morgan, Augustus British mathematician who initiated and developed a theory of relations in logic. He devised a symbolism that could express such notions as the contradictory, the converse, and the transitivity of a relation, as well as the union of two relations. De Morgan was born in Madura (now Madurai), Tamil Nadu, India, and studied at Cambridge. He was the first professor of mathematics at University College, London, 1828-58. In his books Formal Logic 1847 and Syllabus of a Proposed System of Logic, De Morgan developed a logic of noun expressions. He also extended his syllogistic vocabulary using definitions, giving rise to new kinds of inferences, both direct (involving one premise) and indirect (involving two premises). He was thus able to work out purely structural rules for transforming a premise or pair of premises into a valid conclusion.

22. De Morgan, Augustus (1806-1871) -- From Eric Weisstein's World Of Scientific Bio de morgan, augustus (18061871), Mathematician who labored to strengthen thelogical basis of mathematics. The Case of augustus de morgan. Amer. Math. http://scienceworld.wolfram.com/biography/deMorgan.html

Branch of Science Mathematicians Nationality English de Morgan, Augustus (1806-1871) Mathematician who labored to strengthen the logical basis of mathematics. He laid the groundwork of his friend Boole's work on symbolic logic. Additional biographies: MacTutor (St. Andrews) References de Morgan, A. A Budget of Paradoxes, 2nd ed., 2 vols. Freeport, NY: Books for Libraries Press, 1969. Rice, A. "What Makes a Great Mathematics Teacher? The Case of Augustus De Morgan." Amer. Math. Monthly

23. Augustus De Morgan --  Encyclopædia Britannica Cite this article. augustus de morgan. born , June 27, 1806, Madura, India MLA style " augustus de morgan." Encyclopædia Britannica. 2004 http://www.britannica.com/eb/article?eu=30085

24. Augustus De Morgan --  Encyclopædia Britannica de morgan, augustus Encyclopædia Britannica Article. augustus de morganborn , June 27, 1806, Madura, India died March 18, 1871, London, Eng. http://www.britannica.com/eb/article?eu=30085&tocid=0&query=esfuerzo de pesca&ct

25. Augustus De Morgan Translate this page augustus de morgan Seite aus einem deutschsprachigen Online-Philosophenlexikon.philosophenlexikon.de, augustus de morgan (1806 - 1871). http://www.philosophenlexikon.de/demorgan.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 Augustus de Morgan (1806 - 1871) Der schottische Mathematiker und Logiker Theorie der Relationen Urteile der traditionellen Logik, als auch mit mehrstelligen Relationen. De Morgan formulierte wichtige der Aussagen- und der Klassenlogik. Nach de Morgan sind die de Morganschen Regeln benannt worden, die allerdings schon im 16. Jahrhundert vom indischen Logiker Siroman Raghunatha angewendet wurden. powered by Uwe Wiedemann

26. Augustus De Morgan http://art.supereva.it/prover.freeweb/morgan.htm

Augustus De Morgan Pagina 1 By mtavarn@tin.it Home page http://freeweb.aspide.it/freeweb/Misteri

27. Augustus De Morgan En El Diccionario Soviético De Filosofía / 1965 Translate this page augustus de morgan versión digital del artículo publicado en el Diccionariofilosófico dirigido por MM Rosental y PF Iudin / 1965. http://www.filosofia.org/enc/ros/demor.htm

Ediciones Pueblos Unidos, Montevideo 1965 Augustus De Morgan es equivalente a la de las negaciones es equivalente a es equivalente a Enciclopedias

28. De Morgan Augustus http://www.lycee-international.com/travaux/HISTMATH/de_morgan/

Liste de Mathématiciens Al Khwarizmi Apollonius de Perge Archimède Argand Jean Bezout Etienne Bombelli Rafaele Boole George Cardano Girolamo Cauchy Augustin Chasles Michel De Moivre Abraham De Morgan Augustus Del Ferro Scipione Descartes René Eratosthene Euclide Fermat Pierre Ferrari Ludovico Fibonacci Leonardo Galois Evariste Gauss Carl Germain Sophie Huygens Christiaan Leibniz Gottfried Pascal Blaise Peano Guiseppe Pythagore Tartaglia Nicolo Viete François Zenon d Elée De Morgan Augustus Historique Augustus de Morgan est née en Inde (le 27 juin 1806), son père un colonel dans l'armée indienne. La famille quitta bientot pour l'Angleterre ou il sera enseigné dans des écoles privées le Latin, le Grècque, l'Hébreu, et les mathématiques. Il détestait les examens. Il entra à Trinity Collège, Cambridge en 1823. Quatre ans plus tard, il refusa de poursuivre ses études n'aimant pas l'aspect compétitif des masters. Refusant l'ambition de ses parents de faire un pretre de lui, Augustus de Morgan, joua d'abord avec l'idée d'étudier la médecine, ensuite la loi. Mais il décida enfin que sa vocation était de devenir mathématicien. Il deviendra premier professeur à UCL (University College London), en 1928. Son temps passé là ne fut pas des plus tranquilles, il résigna de sa poste par principe après qu'un de ses collègues fut jeté dehors sans explication. Il reprit la place 5 ans plus tard lorsque son remplacent mourut. Mais il allait encore abandonner son poste en 1861. En temps que professeur, il avait une réputation de rendre les maths vivantes et intéressant pour ses élèves.

29. Athenaeum Index: Contributor Record. Contributor de morgan, augustus. Research Notes See de morgan, augustus? for reviews probably attributable to this contributor. http://web.soi.city.ac.uk/~asp/v2/contributors/contributorfiles/DEMORGAN,Augustu

Contributor: DE MORGAN, Augustus Biographical Details: Dates: Source of Characteristics: DNB Characteristics: Professor of Mathematics at University College, London Source of Characteristics: Athenaeum Characteristics: Contributed on a wide range of subjects, including astronomy, mathematics (especially geometry), science, religion, the history of science, philosophy, enyclopaedias and medicine. Research Notes: See DE MORGAN, Augustus ? for reviews probably attributable to this contributor. Research Notes: Obituary published in the Athenaeum, March 25 1871. Mark: DE MORGAN Add your annotation to this record. The following reviews have been identified as being written by this contributor: 1859. - Memoir of the Life and Labours of the Rev. Jeremiah Horrox 2198 (December 11,1869) 1869. - The Transit of Venus across the Sun 2198 (December 11,1869) The ABC of Thought 1787 (January 25,1862) Abstract Log, for the Use of American Navigations 1132 (July 7,1849) Academic Reform and University Representation 1713 (August 25,1860) An Account of the Aurora Borealis seen near Cambridge, October 24, 1837

30. Athenaeum Index: Contributor Record. Contributor de morgan, augustus ? Biographical details Research Notes Pleasesee de morgan, augustus for complete biographical details. Mark de morgan? http://web.soi.city.ac.uk/~asp/v2/contributors/contributorfiles/DEMORGAN,Augustu

Contributor: DE MORGAN, Augustus ? Biographical Details: Research Notes: Please see DE MORGAN, Augustus for complete biographical details. Mark: DE MORGAN? (Illegible) Add your annotation to this record. The following reviews have been identified as being written by this contributor: An Inquiry into the Nature of Induction 1061 (February 26,1848) On the Heat of Vapour, and on Atmospherical Refractions 694 (February 13,1841) The Syllogism considered as an Analysis of the Reasoning Process 1061 (February 26,1848) Main Page Search Screen Browse Menu Bulletin Board ... Help

31. New Page 2 1 tidal letter from. de morgan, augustus (18061871), mathematician, was bornat Madura, in the Madras presidency. de morgan was sent to various schools. http://home.bt-webworld.com/tides/ebdg.htm

Dayman to Gutch Back Dayman, Joseph Lieutenant.1f Dean, Edward, of Macclesfield. 1 tidal letter from. de Morgan, Augustus (1806-1871), mathematician, was born at Madura, in the Madras presidency. De Morgan was sent to various schools. He had a gift for drawing caricatures, and read algebra ‘like a novel.’ He pricked out equations on the school-pew, some of which remained after his death, instead of listening to the sermon. In February 1823 he entered Trinity College, Cambridge, as a ‘bye-term man.’ He made many friends at college, including his teachers, Whewell and Peacock. He belonged to a musical society called the ‘Camus’ (i.e. Cambridge Amateur Musical Union Society), and was a skilful flute-player. After some thoughts of medicine he resolved to go to the bar, and entered Lincoln's Inn. The university of London, which afterwards became University College, was just being started. De Morgan found law unpalatable, and on 23 Feb. 1828 was unanimously elected the first professor of mathematics, although the youngest applicant, on the strength of very high testimonials from Peacock, Airy, and other Cambridge authorities. He gave his introductory lecture, ‘On the Study of Mathematics,’ 5 Nov. 1828. From the first De Morgan was a most energetic worker. In May 1828 he was elected a fellow of the Astronomical Society, and in 1830 was placed on the council. He became a member of the Society for the Diffusion of Useful Knowledge, founded by Brougham and others in 1826. He became a member of the committee in 1843. The society was dissolved in 1846. In the vacation of 1837 De Morgan married Sophia Elizabeth Frend, and settled at 69 Gower Street. His lectures at University College attracted many men, afterwards distinguished. He had the power of clear exposition. He never became a fellow of the Royal Society, and held that it was too much open to social influences to be thoroughly efficient as a working institution. His dislike to honorary titles led him to refuse the offer of the LL.D. degree from Edinburgh. For many years he did his best to promote the adoption of a decimal coinage.

32. DE MORGAN, Augustus., An Essay On Probabilities And On Their Application To Life Rachel Lee Rare Books (formerly Thoemmes). de morgan, augustus. An Essay on Probabilitiesand on their application to Life Contingencies and Insurance Offices. http://www.polybiblio.com/tabooks/BOOKS055584.html

Rachel Lee Rare Books (formerly Thoemmes) DE MORGAN, Augustus. Small 8vo: engraved title-page with vignette, xviii, 306, xl pp; untrimmed and partly unopened. Original brown cloth, gilt lettering to spine, slightly frayed at top and bottom of spine, otherwise a good copy. First edition. . "De Morgan's conception of probability was largely derived from Laplace, whose ideas (and errors) he was thus instrumental in propagating among his nineteenth-century successors. His method of approach was to construe the theory as an extension of formal logic, that is, as an investigation of the rules whereby propositions not absolutely certain affect the certainty of other propositions with which they are connected." P.L. Heath in "The Encyclopedia of Philosophy". " .... the theory of probabilities, I take to be the unknown God which the schoolmen ignorantly worshipped." (De Morgan in "Formal Logic", 1847). Goldsmiths' 30437. This item is listed on Bibliopoly by Rachel Lee Rare Books (formerly Thoemmes) ; click here for further details.

33. DE MORGAN, Augustus., [Papers]. On The General Equation Of Surfaces Of The Secon Rachel Lee Rare Books (formerly Thoemmes). de morgan, augustus. Papers.On the General Equation of Surfaces of the Second degree http://www.polybiblio.com/tabooks/BOOKS055911.html

Rachel Lee Rare Books (formerly Thoemmes) DE MORGAN, Augustus. [Papers]. On the General Equation of Surfaces of the Second Degree / Sketch of a Method of Introducing Discontinuous Constants into the Arithmetical Expressions for Infinite Series, in cases where they admit of several Values / On a Question in the Theory of Probabilities / On the Foundation of Algebra [no. I] / On the Foundation of Algebra, No. II / On the Foundation of Algebra, no. III / On Divergent Series, and various Points of Analysis connected with them / On the Foundation of Algebra, no. IV, on Triple Algebra / On the Structure of the Syllogism, and on the Application of the Theory of Probabilities to Questions of Argument and Authority / Methods of Integrating Partial Differential Equations. Cambridge: at the University Press. 1833-1849. Quarto. Pages 77-94, 185-193, 423-430, 173-187, 287-300, 139-142, 182-203, 241-254, 379-408, 606-613, in "Transactions of the Cambridge Philosophical Society". Disbound. . De Morgan's paper 'On the Structure of the Syllogism' in which he developed a logic of noun expressions, formed the basis of "Formal Logic", published the following year (1847). This item is listed on Bibliopoly by Rachel Lee Rare Books (formerly Thoemmes) ; click here for further details.

34. HighBeam Research: Search Results: Article de morgan, augustus (18061871). The Hutchinson Dictionary of ScientificBiography; 1/1/1998. Read the Full Article, Get a FREE Trial http://www.highbeam.com/library/doc0.asp?DOCID=1P1:28909854&num=3&ctrlInfo=Round

35. HighBeam Research: ELibrary Search: Results 13. de morgan, augustus (18061871) The Hutchinson Dictionary ofScientific Biography; January 1, 1998 de morgan, augustus (1806 http://www.highbeam.com/library/search.asp?FN=AO&refid=ency_refd&search_dictiona

36. Talbot’s Correspondence:Search The Letters Talbot’s Correspondents Calendar of Letters Search the Letters. returnto list of correspondents. Name search for de morgan augustus 1 document http://www.foxtalbot.arts.gla.ac.uk/letters/name.asp?namestring=De-Au&target=244

37. Talbot Correspondence Project: DE MORGAN Augustus To WHFT, 07 Aug 1835 [03113] Talbot Correspondence de morgan augustus to WHFT, 07 Aug 1835 03113,Talbot Correspondence Project, University of Glasgow. http://www.foxtalbot.arts.gla.ac.uk/corresp/03113.asp?target=1

38. De Morgan, Augustus (1806-1871) de morgan, augustus (18061871). ed. de morgan, augustus. The Biographical Dictionaryof Sciences Mathematics. New York Peter Bedrick Books, 1985. p. 40. http://pirate.shu.edu/projects/reals/history/demorgan.html

De Morgan, Augustus (1806-1871) Augustus De Morgan was an important innovator in the field of logic. In addition, he had many contributions to the field of mathematics and the chronicling of the history of mathematics. Augustus De Morgan was born in Mandura, India, on June 27, 1806. His father was a colonel in the Indian Army. His family soon moved to England where they lived first at Worcester and then at Taunton. His early education was in private schools where he learned Latin, Greek, Hebrew, mathematics and a dislike of exams. He entered Trinity College, Cambridge, in 1823 and graduated four years later. After graduation, De Morgan reached the point of deciding what to do with the rest of his life. Dubious of competitive fellowships and master degrees, he refused to continue his education. Fearful of hypocrisy and religious bigotry, he also rejected his parents' wish of becoming a priest. After contemplating medicine and law, he finally decided to become a mathematician. In 1828, he was awarded the position of first Professor of Mathematics at University College in London. His time at the university was far from quiet. In 1831, he resigned on principle after another professor was fired without explanation. He regained his job five years later when his replacement died in an accident. He would resign again in 1861. As a teacher, he was highly praised at making mathematics alive and interesting to his students. In addition, he wrote textbooks on numerous subjects in mathematics and logic.

39. Allmath.com - Math Site For Kids! Home Of Flashcards, Math Click Here de morgan, augustus. (180671). Mathematician, born in Madura,India. He studied at Cambridge, and became the first professor http://www.allmath.com/biosearch.php?QMeth=ID&ID=9362

40. Morgan Translate this page de morgan augustus, anglais, 1806-1871. Précurseur de la logique formelleet propositionnelle, que Leibniz désirait tant mettre en oeuvre. http://www.sciences-en-ligne.com/momo/chronomath/chrono1/Morgan.html

De MORGAN Augustus, anglais, 1806-1871 Leibniz Boole Peirce London Mathematical society Lois de Morgan : On nomme ainsi les deux lois usuelles de logique propositionnelle attribuées à A. de Morgan non (A ou B) = (nonA) et (non B) non (A et B) = (non A) ou (non B) Le ou est ici inclusif : il contient le et un dessin vaut mieux qu'un long discours et que la logique rejoint les ensembles Cantor : ou exclusif ou bien i mplication Frege , est celle de Bourbaki) : ou B) vrai S'il pleut, je prendrai mon parapluie A B A et B A ou B non A non B A B (non A) ou B V V V V F F V V V F F V F V F F F V F V V F V V F F F F V V V V a/b Oresme Leibniz x Neper Hamilton Listing

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