21. Guilielmus Xylander Information Evidence of his character is found in the fact that he entertained as a guest, fora whole month, a scientific adversary, adriaan van roomen, and then paid the http://www.searchspaniel.com/index.php/Guilielmus_Xylander

22. Roomen adriaan van roomen. Born 29 Sept 1561 adriaan van roomen is often knownby his Latin name Adrianus Romanus. After studying at the http://intranet.woodvillehs.sa.edu.au/pages/resources/maths/History/Rmn.htm

23. Full Alphabetical Index Translate this page Ludolph (223) van Dantzig, David (55) van der Waerden, Bartel (552*) van Heuraet,Hendrik (170) van Lansberge, Philip (243) van roomen, adriaan (419) van http://intranet.woodvillehs.sa.edu.au/pages/resources/maths/History/Flllph.htm

24. Roomen adriaan van roomen. Born 29 Version for printing. adriaan van roomen is oftenknown by his Latin name Adrianus Romanus. After studying http://www-groups.dcs.st-andrews.ac.uk/history/Mathematicians/Roomen.html

Adriaan van Roomen Born: 29 Sept 1561 in Louvain, Belgium Died: 4 May 1615 in Mainz, Germany Show birthplace location Previous (Chronologically) Next Biographies Index Previous (Alphabetically) Next Main index Version for printing Adriaan van Roomen is often known by his Latin name Adrianus Romanus. After studying at the Jesuit College in Cologne, Roomen studied medicine at Louvain. He then spent some time in Italy, particularly with Clavius in Rome in 1585. One of Roomen's most impressive results was finding p to 16 decimal places. He did this in 1593 using 2 sided polygons. Roomen's interest in p was almost certainly as a result of his friendship with Ludolph van Ceulen Roomen proposed a problem which involved solving an equation of degree 45. The problem was solved by who realised that there was an underlying trigonometric relation. After this a friendship grew up between the two men. proposed the problem of drawing a circle to touch 3 given circles to Roomen (the Apollonian Problem) and Roomen solved it using hyperbolas , publishing the result in 1596.

25. References For Roomen References for adriaan van roomen. Version for printing P Bockstaele, adriaan vanroomen, Nationaal biografisch woordenboek (Brussels, 1966), 751765. http://www-groups.dcs.st-andrews.ac.uk/history/References/Roomen.html

References for Adriaan van Roomen Version for printing Biography in Dictionary of Scientific Biography (New York 1970-1990). Articles: P P Bockslaele, Adrianus Romanus and the trigonometric tables of Georg Joachim Rheticus, in S S Demidov et al. (eds), Amphora : Festschrift for Hans Wussing on the occasion of his 65th birthday (Basel- Boston- Berlin, 1992), 55-66. P Bockstaele, Adriaan van Roomen, Nationaal biografisch woordenboek (Brussels, 1966), 751-765. P P Bockstaele, Adrianus Romanus and Giovanni Camillo Glorioso on isoperimetric figures, in Mathematical perspectives (New York-London, 1981), 1-11. Main index Birthplace Maps Biographies Index History Topics ... Anniversaries for the year JOC/EFR December 1996 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/Roomen.html

26. François Viète -- Facts, Info, And Encyclopedia Article In that year adriaan van roomen gave out as a problem to all mathematicians anequation of the 45th degree, which, being recognized by Vieta as depending on http://www.absoluteastronomy.com/encyclopedia/f/fr/françois_viète.htm

François Viète [Categories: Pre-19th century cryptographers, French mathematicians, 1603 deaths, 1540 births] François Viète (or Vieta seigneur de la Bigotière (1540 - December 13, 1603), generally known as Franciscus Vieta , was a (The Romance language spoken in France and in countries colonized by France) French (A person skilled in mathematics) mathematician He was born at (Click link for more info and facts about Fontenay-le-Comte) Fontenay-le-Comte , in (A low-lying region of west central France on the Bay of Biscay) Poitou , and is believed to have been brought up as a (The Christian Church based in the Vatican and presided over by a pope and an episcopal hierarchy) Roman Catholic ; but there is no doubt that he was a (A French Calvinist of the 16th or 17th centuries) Huguenot for several years. On the completion of his studies in (The collection of rules imposed by authority) law at (The battle in 1356 in which the English under the Black Prince defeated the French) Poitiers Vieta began his career as an advocate in his native town. He left in about 1567, and later became a councillor of the (Click link for more info and facts about parlement) parlement of (A former province of northwestern France on a peninsula between the English Channel and the Bay of Biscay) Brittany , at (Click link for more info and facts about Rennes) Rennes . The religious troubles drove him out, and

27. List Of Belgians -- Facts, Info, And Encyclopedia Article (Click link for more info and facts about adriaan van roomen) adriaan van roomen mathematician (A Flemish surgeon who is considered the father of modern http://www.absoluteastronomy.com/encyclopedia/L/Li/List_of_Belgians.htm

List of Belgians [Categories: Lists of people by nationality, Belgian people] This is a list of (A native or inhabitant of Belgium) Belgian people , and more precisely of notable people who (1) were Belgian (A native or naturalized member of a state or other political community) citizen s at least during one period of their life, or (2) are Belgian citizens , as well as of notable people (3) born in Belgium or in the provinces of present-day Belgium, but who were not or are not Belgian citizens (either because Belgium did not exist at the time of their life or because they had or have another citizenship). The names of people of the last category (3) are italicized The list also comprises (4) fictional characters who are undisputedly Belgians, and (5) important ones whose citizenship is unknown or not Belgian and with Belgian creators. The names of fictional characters of the last category (5) are italicized The same person may appear under several headings. Architects Stéphane Beel Hilde Daem (Click link for more info and facts about Xaveer De Geyter) Xaveer De Geyter Paul Hankar (Belgian architect and leader in art nouveau architecture (1861-1947)) Victor Horta Eugeen Liebaut Paul Robbrecht (Click link for more info and facts about Henry Van de Velde) Henry Van de Velde Bob Van Reeth Marie-José Van Hee Authors (Click link for more info and facts about Pieter Aspe) Pieter Aspe Henry Bauchau (Click link for more info and facts about Louis Paul Boon) Louis Paul Boon (Click link for more info and facts about Herman Brusselmans)

28. Adriaan Van Roomen: Information From Answers.com 1561 Information From Answers.com September 29 adriaan van roomen, Belgian mathematician (died 1615);December 9 - Edwin Sandys, English founder of the colony of Virginia (died 1629) http://www.answers.com/topic/adriaan-van-roomen

showHide_TellMeAbout2('false'); Business Entertainment Games Health ... More... On this page: Wikipedia Mentioned In Or search: - The Web - Images - News - Blogs - Shopping Adriaan van Roomen Wikipedia Adriaan van Roomen Adriaan van Roomen 29 September 4 May ), also known as Adrianus Romanus , was a Belgian mathematician . He was born in Leuven , where he became professor, but then travelled extensively in Europe. He worked in algebra trigonometry and geometry ; and on the decimal expansion External links MacTutor biography http://www-history.mcs.st-andrews.ac.uk/history/Mathematicians/Roomen.html This entry is from Wikipedia, the leading user-contributed encyclopedia. It may not have been reviewed by professional editors (see Mentioned In Adriaan van Roomen is mentioned in the following topics: Fran§ois Vi¨te List of Belgians List of mathematicians Wikipedia information about Adriaan van Roomen This article is licensed under the GNU Free Documentation License . It uses material from the Wikipedia article "Adriaan van Roomen" More from Wikipedia Your Ad Here Jump to: Wikipedia Mentioned In Or search: - The Web - Images - News - Blogs - Shopping Send this page Print this page Link to this page Tell me about: Home About Tell a Friend Buzz ... Site Map

29. Tentoonstelling Pi De auteur van dit werk was de ZuidNederlander adriaan van roomen, in 1597 hoogleraargeneeskunde te Würzburg, daarvoor te Leuven, waar hij ook wiskunde http://www.etcl.nl/bc/tentoonstelling/pi/object4.htm

30. Tentoonstelling Pi Na twee hoofdstukken over toepassingen vertelt hij in Capittel XIV over zijnbriefwisseling met adriaan van roomen, waarin deze hem hogeregraadsvergelijkingen http://www.etcl.nl/bc/tentoonstelling/pi/object3.htm

31. Biografia De Van Roomen, Adriaan Translate this page van roomen, adriaan. (Lovaina, 1561-Maguncia, 1615) Matemático flamenco.Realizó sus estudios en Alemania e Italia. Profesor en Lovaina y Wurzburgo, http://www.biografiasyvidas.com/biografia/v/van_roomen.htm

Inicio Buscador Las figuras clave de la historia Reportajes Los protagonistas de la actualidad Van Roomen, Adriaan (Lovaina, 1561-Maguncia, 1615) Matemático flamenco. Realizó sus estudios en Alemania e Italia. Profesor en Lovaina y Wurzburgo, en 1595 fue nombrado astrónomo del rey de Polonia. Sus trabajos versaron principalmente sobre geometría y trigonometría plana y esférica. Propuso y dio solución a una ecuación algebraica de grado 45. Entre sus obras destacan Ideae mathematicae (1593) y Canon triangulorum sphericorum Inicio Buscador Recomendar sitio

32. Índice Alfabético - V van Roey, Joseph Ernst van Roome, Jan van roomen, adriaan van Roymerswaele,Marinus Claesz van Ruysbroeck, Beato Jan van Ruysbroek, Jan http://www.biografiasyvidas.com/biografia/v/index0005.htm

Inicio Buscador Las figuras clave de la historia Reportajes Los protagonistas de la actualidad V Van Hasselt, Willem Van Heemskerck, Egbert Van Heemskerck, Jacob Van Heemskerck, Maarten ... Van Swieten, Gerard Inicio Buscador Recomendar sitio

33. Adriaan Van Roomen adriaan van roomen. adriaan van roomen (29 September 1561 4 May 1615),also known as Adrianus Romanus, was a Belgian mathematician. http://pedia.newsfilter.co.uk/wikipedia/a/ad/adriaan_van_roomen.html

newsfilter.co.uk encyclopedia Main Page See live article Alphabetical index guidething - online travel guide Adriaan van Roomen Adriaan van Roomen 29 September 4 May ), also known as Adrianus Romanus , was a Belgian mathematician . He was born in Louvain , where he became professor, but then travelled extensively in Europe. He worked in algebra trigonometry and geometry ; and on the decimal expansion External link MacTutor biography This article is from Wikipedia . All text is available under the terms of the GNU Free Documentation License blogthing - free blog hosting

34. Chapter 4 Influence On Other Geometers The InfluenceJesuits Had On adriaan van roomen (d 1615) attended the Jesuit school in Cologne. He knew Claviusand is remembered for his work on isoperimetric problems. http://www.faculty.fairfield.edu/jmac/sj/jg/jg4.htm

Chapter 4 Influence on Other Geometers The influence Jesuits had on other geometers is treated under two headings: a. In teaching other geometers b. In correspondence with other geometers a In teaching other geometers Apart from the direct contributions to geometry, the Jesuits indirectly influenced its development by their relations with non-Jesuit geometers. They did this as teachers, as relatives, as friends, as correspondents, and as adversaries. Gilbert Highet speaks about the Jesuit educational experience in the years before the suppression of the Society. The best thing about its method was the thoroughness with which they planned. . . .The Jesuit regulations made sure that the pupils realized what they were doing, and why. It is noticeable that very many of their pupils have turned out to be men of very strong will-power and long vision. A good modern example is the Irishman who spent seven years on writing a book about the events of a single day, and then spent seventeen more on writing about the dreams of a single night. You may not admire Ulysses and Finnegans Wake

35. Maximiliaan Van Der Gucht (1603-1689) Due To His Connection With The Spierinx Ta adriaan Arents Gouda (c.16301667). History painter, not on Guild list. Also owned het Casteel van roomen (The Rome Castle) in 1664, on east side of http://www.xs4all.nl/~kalden/dart/d-a-gouda.htm

AG Adriaan Arents Gouda (c.1630-1667). History painter, not on Guild list. From a wealthy family, he traveled to Italy ; owned a library. Lived east side of Verwersdijk, inherited this house 1655 and died there. Also owned and let for 180 guilders De Vergulde Claeuw (The Gilded Claw), west side of Voorstraat. Also owned het Casteel van Roomen (The Rome Castle) in 1664, on east side of Voorstraat. Note. All addresses in Bredius, II 684. Kaldenbach . A full presentation is on view at www.xs4all.nl/~kalden/

36. Stevins Sterktenbouwing adriaan van roomen of Romanus (1561 1615) was Rector der Ghemeenschool totLeuven . Girolamo Cardano (1501 - 1576), Italiaans wiskundige. « http://www.xs4all.nl/~adcs/stevin/stercten/

Stevin Woordenlijst Overzicht , Inleiding strijken definities strijdtoneel ... Noten Stevins Sterktenbouwing De Sterctenbouwing verscheen in 1594, en werd al snel vertaald in het Engels (1604, niet in druk uitgegeven), Duits (1608) en Frans (1634). Nu staat het in deel IV van de Principal Works , met een nieuwe vertaling, en een gedegen inleiding en commentaar. 7 blz Begin Titelblad, Opdracht en Cortbegrip blz 1 - 7 Hoofdstuk 1 Bepaling van 21 termen blz 7 - 27 Hoofdstuk 2 Tekenen van een zeshoekige sterkte blz 27 - 32 Hoofdstuk 3 Aftekenen op het land, en bouwen blz 33 - 34 Hoofdstuk 4 Andere dan zeshoekige sterkten blz 35 - 39 Hoofdstuk 5 Doel ('wit'), met kort historisch overzicht blz 39 - 71 Hoofdstuk 6 Discussies over de ideale ('volkomen') sterkte blz 71 - 91 Hoofdstuk 7 Discussies over aanpassing aan omstandigheden Inleiding De sterktenbouwing "door wisconstich beleyt, met sichtstralen opt meeste voordeel gheteyckent" was in het Italiaans en in het Frans al "overvloedelick beschreven". Stevin maakte een beschrijving in onze taal: Ten eersten, om daer mede te gherieven veel Nederduytschen in die spraken onervaren, als Kriegsluyden, Boumeesters, ende ander tot wetenschap van dien belusticht, waer uijt volghen can, niet alleen vernoughinghe van soodanighe besonder persoonen, maer oock daden streckende

37. Simon Stevin, Flemish Tutor Of A Dutch Prince This is clear from the writings of Isaac Beeckman, Constantijn and ChristiaanHuyghens and Adrianus Romanus (adriaan van roomen). http://users.ugent.be/~gvdbergh/files/publatex/stevinoe.html

Simon Stevin, Flemish tutor of a Dutch Prince Portrait of Stevin (Library of the University of Leiden (The Netherlands)) To a general educated public Simon Stevin is mainly associated with the introduction of the decimal fractions, which laid later on to the foundation of the decimal system of weights and measures. He realised a lot of technical inventions out of which the construction of a 28-passenger sailing carriage used along the seashore was best known to his contemporaries. For those less familiar with Stevin we recall that he is born in Brugge (now Belgium ) in 1548 as the illegitimate child of Anthuenis (Anton) Stevin and Catelyne (Catherine) van der Poort . Recent studies proves that his father could be a cadet son of a burgomaster (mayor) of Veurne ; his mother was the daughter of a burgher family of Ieper Ypres ), who married later on a merchant in carpet-weaving and silk-trade, who belonged to a family with sympathy for the Calvinism religion. Practically nothing more is known of Stevin's youth and education. He was at first employed in

38. TRIGONOMETRY - LoveToKnow Article On TRIGONOMETRY Landsberg (or Lansbeighe de Meuleblecke) and adriaan van roomen. In 1593van roomen proposed, as a problem for all mathematicians, http://5.1911encyclopedia.org/T/TR/TRIGONOMETRY.htm

TRIGONOMETRY TRIGONOMETRY HIsToRY (n. 225) sin (nI .225)sin 225 was discovered empirically, and used for the purpose of recalculation. Bhaskara (fi. f 150) used the method, to which we have now returned, of expressing sines and cosines as fractions of the radius; he obtained the more correct values sin 3 45 = 100/1529, cos 3 45 =466/467, and showed how to form a table, according to degrees, from the values sin 1 = 10/573, cos f=6568/6569, which are much more acctirate than Ptolemys values. The Indians did not apply their trigonometrical knowledge to the solution of triangles; for astronomical purposes they solved right-angled plane and spherical triangles by geometry. The Arabs were acquainted with Ptolemys Almagest, and they probably learned from the Indians the use of the sine. The celebrated astronomer of Batnae, Albategnius (q.v), who died in A.D. 929930, and whose Tables were translated in the 12th century by Plato of Tivoli into Latin, under the title Dc scientia stellarum, employed the sine regularly, and was fully conscious of the advantage of the sine over the chord; indeed, he remarks that the continual doubling is saved by the use of the former. He was the first to calculate sin ~ from the equation sin ~/cos 4=k, and he also made a table of the length of shadows of a vertical object of height 12 for altitudes 1, 2, . . . of the sun; this is a sort of cotangent table. He was acquainted not only with the triangle formulae in the Almagest, but also with the formula cos a=cos b cos c + sin b sin c cos A for a spherical triangle ABC. Abul-Wafg of Bagdad (b. 940) was the first to introduce the tangent as an independent function:

39. Tentoonstelling Pi De auteur van dit werk was de ZuidNederlander adriaan van roomen, In dithoogst merkwaardige en unieke werk berekent adriaan van roomen http://bc.ub.leidenuniv.nl/bc/tentoonstelling/pi/object4.htm

Ludolph van Ceulen en de berekening van het getal PI Inleiding De levensloop van Ludolph van Ceulen De vroege geschriften van Van Ceulen De grote hoofdwerken ... Ludolph van Ceulens grafsteen 4. Werken van tijdgenoten 12 Simon Stevin, La pratique d'arithmetique. Leyde, Christophle Plantin, 1585. 644 D 23:2 Deze verhandeling is, zoals vaak, gebonden achter Stevins L'arithmetique uit 1583. Aan het eind van zijn werk, verwijst Stevin voor verdere studie, naar het 'groote werk' van Van Ceulen. Dit werk is echter nooit verschenen. 13 Adriaan Anthonisz., Solutie op die een en vijftichste ende tweenvijftichste propositie, die met wille sonder Facit sijn voorghestelt in eenen boeck onlancx wtghegheven by Meester Nicolaum Petri Daventriensem van die inleydinghe hoemen verstaen ende ghebruycken sal die celeste ende terrestre cloote. Alckmaer, Aert Cornelissz, 1589. 1387 B 33 De uit de strijd tegen Spanje bekende ingenieur en burgemeester van Alkmaar loste in dit boekje twee opgaven van Nicolaas Pietersz. van Deventer op, die deze 'met wille sonder Facit', dus met opzet z onder oplossing, had gepubliceerd. Ze gaan over boldriehoeksmeting. De figuren in dit boekje zijn met de hand getekend op door de drukker in de tekst opengelaten plaatsen. Hij begint met: 'Totten Const Liefhebbende Leser. Het sullen ter avontuere enige verwondert sijn van dat wij eertijdts hebben geschreven tegens den quadrature des circkels van Meester Symon van Eycke ende nu weder dese bedencken ende waernemingen op enige propositien by Meester Nicolaum Petri Daventriensem voor ghewent als ofte wij onse werck alleenlick daer van sochten te maken omme eenen ygelick te berispen.' Het in dit citaat genoemde geschrift tegen Simon van der Eycke is volgens het vervolg opgesteld op verzoek van prins Willem van Oranje, maar nooit in druk verschenen.

40. Tentoonstelling Pi Ludolph van Ceulen en de berekening van het getal PI over toepassingen vertelthij in Capittel XIV over zijn briefwisseling met adriaan van roomen, http://bc.ub.leidenuniv.nl/bc/tentoonstelling/pi/object3.htm

Ludolph van Ceulen en de berekening van het getal PI Inleiding De levensloop van Ludolph van Ceulen De vroege geschriften van Van Ceulen De grote hoofdwerken ... Ludolph van Ceulens grafsteen 3. De grote hoofdwerken boeckvercooper, woonende aen 't Marct-veldt, in't Gulden ABC, 1596. 672 A 5 Deze uitvoerige titel van het belangrijkste werk van Van Ceulen is hier geheel weergegeven omdat hij precies de inhoud van het onderhavige werk beschrijft en geschreven lijkt, om naar het gebruik van die tijd, als reclame voor de ramen gehangen te worden. Jan Andriesz. Cloeting was een zoon van Maritgen Simonsdr., een zuster van Van Ceulens vrouw. Het boek is opgedragen aan prins Maurits. Na de opdracht volgt een sonnet, ondertekend met 'Oordeelt sonder Twist', een motto waarachter Jan Jansz. Orlers schuilgaat, die op zijn beurt gehuwd was met een dochter van Maritgen Simonsdr.In Capittel II staat de eerste propositie, die Van Ceulen het 'Fondament' van zijn theorie zal noemen. Zij komt overeen met de verdubbelingsformule voor zijden van ingeschreven veelhoeken, zoals die vroeger in het meetkundeonderwijs behandeld werd: a (4 - a n )) als de straal 1 is.

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