81. Wiswijzer Les 2 Archimedes, Ptolemeus, Zu Chongzhi, AlKhasji, ludolph van Ceulenen Metius. Les 3 Leibniz, Graaf Georges Buffon en de rekenmachine. http://www.wiswijzer.nl/pagina.asp?nummer=311

82. Pi Page righ t now tell me where the logic is in that ) ludolph van Ceulenwas the first man to calculate 20 digits of pi back in the 1610s. http://www.geocities.com/lkp42/pi.html

Back in my junior year of high school, our final six weeks precalculus project was to pair off and write a math research paper. Little did my friend Jessica and I know what random things we would uncover as we researched the number pi. Of course, there were methods upon methods of calculating pi, some so simple and inaccurate that even we could have done better, and others way above our heads. Yet, we did uncover some humor midst all the number calculating. Francois Viete, who found an approximation of pi accurate to nine decimal places way back in the day in the 1580s by using polygon approximations, was thought to be "in league with the devil" because he managed to break spaniard top secret code. (he's good with numbers and patterns, so he's evil? r i g h t...now tell me where the logic is in that...) Ludolph van Ceulen was the first man to calculate 20 digits of pi back in the 1610s. After his death, another calculation credited to van Ceulen was published by his wife containing 32 digits and even later a friend of his, Willebrord Snellius, famous for pi-related research himself, credited Ludolph with finding a 35 digit estimation of pi. Why do we care how many digits Ludolph calculated? Well, rumor has it he had his calculation for pi etched on his tombstone, however historians have debated for years whether digits 33-35 or all 35 digits were etched. The world will never know. Ludolph's gravestone has been lost. Another nifty fact, Leonhard Euler, credited as the greatest mathematician of all time discovered that

83. Kleine Publicaties Van De UB EUR 10, 36, RM.Th.E. Oomes, Pi in de bibliotheek over ludolph vanCeulen en de berekening van het getal Pi (Leiden, 2000), EUR 10, 35, http://ub.leidenuniv.nl/pub/klpubl.html

Bezoekersgids Catalogi Bijzondere Collecties Vakgebieden Kleine publicaties van de Leidse Universiteitsbibliotheek J.P. Hinrichs 300 jaar Sint-Petersburg. (Leiden 2003). in voorbereiding Descartes en Leiden. Vrienden en vijanden, bewonderaars en bestrijders (Leiden 2003). EUR 7,50 Kruis het vakje aan om het item toe te voegen aan uw bestellingen en voer uw gegevens in in voorbereiding Wim van Anrooij Van historielied tot detective: beeldvorming rond graaf Floris V († 1296) (Leiden, 2002). EUR 10 Kruis het vakje aan om het item toe te voegen aan uw bestellingen en voer uw gegevens in Jan Just Witkam Vroomheid en activisme in een islamitisch gebedenboek. De geschiedenis van de Dalâ'il al-Khayrât van al-Gazûlî (Leiden, 2002). EUR 15 Kruis het vakje aan om het item toe te voegen aan uw bestellingen en voer uw gegevens in Marijtje Sluis; met een bijdrage van Kasper van Ommen 'Si ce n'est pour nous, alors pour nos successeurs'. Honderdvijftig jaar Bibliothèque Wallonne (Leiden, 2002).

84. Curiosidades Translate this page Mas o cálculo mais impressionante foi efetuado pelo matemático holandêsLudolph van ceulen (1540-1610) no final do século XVI. http://www.matematica.com.br/curioso6.htm

85. Lijst Van Wiskundigen - Wikipedia NL (Tjechie, 18931960) Ernesto Cesaro? (Italie, 1859-1906) ludolph vanCeulen? (Duitsland, 1540-1610) Gregory J. Chaitin? (USA, http://nl.wikipedia.org/wiki/Lijst_van_wiskundigen

86. History 1596 A.D 1596 AD Rene DescartesThe Father of Analytical Geometry or LudolphVan ceulen and the history of pi Rene Descartes was born on http://faculty.oxy.edu/jquinn/home/Math490/Timeline/1596AD.html

1596 A.D. Rene Descartes -The Father of Analytical Geometry or Ludolph Van Ceulen and the history of pi Rene Descartes was born on March 31, 1596 in Touraine, France. His family lived in the estate of Les Cartes at La Haye, France and his father was a Councilor in the city of Rennes, France. The second child of a family of two sons and one daughter, Descartes was sent to the Jesuit School at La Fleche at the age of 8. There he studied classics, logic and traditional Aristotelian philosophy and math. While in school, Descartes suffered from poor health and was granted permission by his school to remain in bed until 11 o'clock in the morning. He continued this practice throughout his life. When he visited Pascal in 1647, he said "the only way to do good work in mathematics and preserve my health is to never allow anyone to make me get up in the morning before I feel inclined to do so"(Ball, p. 1) When he left school in 1612, he spent 2 years in Paris studying mathematics with his schoolboy friend Mersenre. During this time period, young men were encouraged to go into the military or the church. Descartes chose the military and joined the army in 1617 under Prince Maurice of Orange. There was no mention of his sleeping schedule during this time, but it probably changed to accommodate army life. After a couple of years in the army he grew disinterested, but not before he was introduced to a problem that would change the course of his life. One day, while walking along the street, he saw a Dutch sign telling of a geometric problem. He asked Isaac Beeckman, Head of the Dutch College at Dort who was unknown to him at the time, to translate it. It took Descartes just a few hours to solve the problem and a friendship grew between them. (MacTutor)

87. Biography.com Cetewayo or Cetshwayo, 1826 1884. Cetti, Francesco, 1726 1778. ceulen, Ludolphvan, 1540 1610. Ceva, Giovanni, ? 1647 1734. Cézanne, Paul, 1839 1906. http://search.biography.com/bio_browse.pl?letter=C&num=500

88. Einige Der Bedeutenden Mathematiker Translate this page Cauchy Augustin Louis, 1789-1857. Cayley Arthur, 1821-1895. ceulen, Ludolphvan, 1540-1610. Chomsky Noel, 1928-. Chwarismi Muhammed Ibn Musa Al, ~830. http://www.zahlenjagd.at/mathematiker.html

Einige der bedeutenden Mathematiker Abel Niels Hendrik Appolonius von Perga ~230 v.Chr. Archimedes von Syrakus 287-212 v.Chr. Babbage Charles Banach Stefan Bayes Thomas Bernoulli Daniel Bernoulli Jakob Bernoulli Johann Bernoulli Nicolaus Bessel Friedrich Wilhelm Bieberbach Ludwig Birkhoff Georg David Bolyai János Bolzano Bernhard Boole George Borel Emile Briggs Henry Brouwer L.E.J. Cantor Georg Ferdinand Carroll Lewis Cassini Giovanni Domenico Cardano Girolamo Cauchy Augustin Louis Cayley Arthur Ceulen, Ludolph van Chomsky Noel Chwarismi Muhammed Ibn Musa Al Church Alonzo Cohen Paul Joseph Conway John Horton Courant Richard D'Alembert Jean Le Rond De Morgan Augustus Dedekind Julius Wilhelm Richard Descartes René Dieudonné Jean Diophantos von Alexandria ~250 v. Chr. Dirac Paul Adrien Maurice Dirichlet Peter Gustav Lejeune Eratosthenes von Kyrene 276-194 v.Chr. Euklid von Alexandria ~300 v.Chr. Euler Leonhard Fatou Pierre Fermat Pierre de Fischer Ronald A Sir Fourier Jean-Baptiste-Joseph Fraenkel Adolf Frege Gottlob Frobenius Ferdinand Georg Galois Evariste Galton Francis Sir Gauß Carl Friedrich Germain Marie-Sophie Gödel Kurt Goldbach Christian Hadamard Jacques Hamilton William Rowan Hausdorff Felix Hermite Charles Heawood Percy Heron von Alexandrien ~60 n.Chr.

89. ¼ÆËãÔ²ÖÜÂÊ The summary for this Chinese (Simplified) page contains characters that cannot be correctly displayed in this language/character set. http://www.jason314.com/pi.htm

¹Å½ñÖÐÍ⣬Ðí¶àÈËÖÂÁ¦ÓÚÔ²ÖÜÂʵÄÑо¿Óë¼ÆË㡣ΪÁ˼ÆËã³öÔ²ÖÜÂʵÄÔ½À´Ô½ºµÄ½üËÆÖµ£¬Ò»´ú´úµÄÊýѧ¼ÒΪÕâ¸öÉñصÄÊý¹±Ï×ÁËÎÞÊýµÄʱ¼äÓëÐÄѪ¡£Ê®¾ÅÊÀ¼ÍÇ°£¬Ô²ÖÜÂʵļÆËã½øÕ¹Ï൱»ºÂý£¬Ê®¾ÅÊÀ¼Íºó£¬¼ÆËãÔ²ÖÜÂʵÄÊÀ½ç¼Í¼ƵƵ´´Ð¡£Õû¸öÊ®¾ÅÊÀ¼Í£¬¿ÉÒÔ˵ÊÇÔ²ÖÜÂʵÄÊÖ¹¤¼ÆËãÁ¿×î´óµÄÊÀ¼Í¡£½øÈë¶þÊ®ÊÀ¼Í£¬Ëæ׿ÆËã»úµÄ·¢÷£¬Ô²ÖÜÂʵļÆËãÓÐÁËÍ»·Éͽø¡£½èÖúÓÚ³¬¼¶¼ÆËã»ú£¬ÈËÇÒѾ­µµ½ÁËÔ²ÖÜÂʵÄ2061ÒÚλ¾«¶È¡£ÀúÊ·ÉÏ×îÂíÀ­ËÉʽµÄ¼ÆË㣬ÆäÒ»Êǵ¹úµÄLudolph Van Ceulen£¬Ëû¼¸ºõºÄ¾¡ÁËÒ»ÉúµÄʱ¼ä£¬¼ÆËãµ½Ô²µÄÄÚ½ÓÕý2 ±ßÐΣ¬ÓÚ1609Äêµµ½ÁËÔ²ÖÜÂʵÄ35λ¾«¶ÈÖµ£¬ÒÔÖÁÓÚÔ²ÖÜÂÊÔڵ¹ú±»³ÆΪLudolphÊý£»Æä¶þÊÇÓ¢¹úµÄWilliam Shanks£¬ËûºÄ·ÑÁË15ÄêµÄ¹âÒõ£¬ÔÚ1874ÄêËã³öÁËÔ²ÖÜÂʵÄСÊýµãºó707λ¡£¿Éϧ£¬ºóÈË·¢ÏÖ£¬Ëû´ÓµÚ528λ¿ªÊ¼¾ÍËã´íÁË¡£°ÑÔ²ÖÜÂʵÄÊýÖµËãµÕâ´¾«È·£¬Êµ¼ÊÒâÒå²¢²»´ó¡£ÏÖ´ú¿Æ¼¼ÁìÓòʹӵÄÔ²ÖÜÂÊÖµ£¬ÓÐÊ®¼¸Î»ÒѾ­×ã¹»ÁË¡£Èç¹ûÓLudolph Van CeulenËã³öµÄ35λ¾«¶ÈµÄÔ²ÖÜÂÊÖµ£¬À´¼ÆËãÒ»¸öÄÜ°ÑÌ«Ñôϵ°üÆðÀ´µÄÒ»¸öÔ²µÄÖܳ¤£¬Îó²î»¹²»µ½ÖÊ×ÓÖ±¾¶µÄ°ÙÍò·ÖÖ®Ò»¡£ÒÔÇ°µÄÈ˼ÆËãÔ²ÖÜÂÊ£¬ÊÇҪ̽¾¿Ô²ÖÜÂÊÊÇ·ñÑ­»·Ð¡Êý¡£×Ô´Ó1761ÄêLambertÖ¤÷ÁËÔ²ÖÜÂÊÊÇÎÞÀíÊý£¬1882ÄêLindemannÖ¤÷ÁËÔ²ÖÜÂÊÊdz¬Ô½Êýºó£¬Ô²ÖÜÂʵÄÉñØæÉ´¾Í±»½Ò¿ªÁË¡£ÏÖÔÚµÄÈ˼ÆËãÔ²ÖÜÂÊ, ¶àÊýÊÇΪÁËÑéÖ¤¼ÆËã»úµÄ¼ÆËãÄÜÁ¦£¬»¹ÓУ¬¾ÍÊÇΪÁËÐËȤ¡£ PC»úÉϵļÆËã

90. 16¥@¬ö¼w°ê¼Æ¾Ç®a The summary for this Chinese (Traditional) page contains characters that cannot be correctly displayed in this language/character set. http://www.dyu.edu.tw/~mfht206/history/16/germany.htm

§ùº¸(Durer , Albrecht) ¥X¥Í¦~¥N¡G °êÄy¡G ¼w°ê ¥Í¥­¡G ¸ê®Æ¥X³B¡G ¥®·à¼Æ¾Ç¤jã¨å(P1146) ½s¿èªÌ ¡G ªü¥Ö¶®§V´µ(Apiyanusi,petrus) ¥X¥Í¦~¥N¡G °êÄy¡G ¼w°ê ¥Í¥­¡G ¸ê®Æ¥X³B¡G ¼Æ¾Ç®aã¨å µÜ¥ì´£¥q§J´µ(Laiyitikusi) ¥X¥Í¦~¥N¡G °êÄy¡G ¼w°ê ¥Í¥­¡G ¸ê®Æ¥X³B¡G ¼Æ¾Ç®aã¨å ½s¿èªÌ ¡G ¦N«ä§J¨½´µ¦hºÖ(Christopher Clavius) ¥X¥Í¦~¥N¡G °êÄy¡G ¼w°ê ¥Í¥­¡G ¸ê®Æ¥X³B¡G http://www-history.mcs.st- andrews.ac.uk/history/ Mathematicians/Clavius.html http://www-history.mcs.st-andrews.ac.uk/history/Mathematician ½s¿èªÌ ¡G ÀR©y¤j¾ÇÀ³¥Î¼Æ¾Ç¨t ¹ù¨Ø®e §J©Ôºû¯Q´µ(Clavius) ¥X¥Í¦~¥N¡G °êÄy¡G ¼w°ê ¥Í¥­¡G ¸ê®Æ¥X³B¡G ªñ¥N¼Æ¾Ç¥v½ÍP.275

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

Page 5     81-90 of 90    Back | 1  | 2  | 3  | 4  | 5