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         Ceulen Ludolph Van:     more detail
  1. Fechtmeister: Friedrich Friesen, Ludolph Van Ceulen, Charles Pierre François Augereau, Hans Talhoffer, Fritz Bacmeister, André Spitzer (German Edition)
  2. Einige Entdeckungen über die Geschichte der Zahl der Pi sowie Leben und Werk von Christoffer Dybvad und Ludolph van Ceulen (Denkschriften der Österreichischen ... Bd 116 (abgeschlossen)) (German Edition) by F. Katscher, 1998-12-15

1. Van_Ceulen
Ludolph van Ceulen. Ludolph Van Ceulen does not appear to have had a universityeducation as his parents were not sufficiently wealthy to pay for one.
http://www-gap.dcs.st-and.ac.uk/~history/Mathematicians/Van_Ceulen.html
Ludolph van Ceulen
Born: 28 Jan 1540 in Hildesheim, Germany
Died: 31 Dec 1610 in Leiden, Netherlands
Click the picture above
to see a larger version Show birthplace location Previous (Chronologically) Next Biographies Index Previous (Alphabetically) Next Main index
Ludolph Van Ceulen does not appear to have had a university education as his parents were not sufficiently wealthy to pay for one. He held a number of posts not only as a teacher of mathematics but also as a fencing teacher. He taught fencing and mathematics in Delft, then in 1594, opened a fencing school in Leiden. In 1600 he was appointed to the Engineering School in Leiden. For the last ten years of his life he taught arithmetic, surveying and fortification in the engineering school. Van Ceulen is famed for his calculation of p to 35 places which he did using polygons with 2 sides. He spent most of his life doing this and it is fitting that the 35 places of p are engraved on his tombstone. In Germany p was called the Ludolphine number for a long time. Van Ceulen had several friends among the mathematicians of the time. In particular his friendships with Simon

2. Ludolph Van Ceulen
Ludolph van Ceulen. Two thousand years ago, the ratio between the. Ludolphvan Ceulen was born at Hildesheim, Germany,. 28 January, 1540.
http://www.angelfire.com/id/vancuren/ludolph.html
Ludolph van Ceulen
Two thousand years ago, the ratio between the circumference of a circle and its diameter was taken to be "3". Although the value was close, as time went on efforts were made to refine the ratio to a more precise constant. Greek mathemetician, Archimedes, correctly asserted that it fell between 3 10/70, and 3 10/71. In the computer age, the number has been calculated to the one millionth decimal place, and has been determined to be an irrational number, without a finite definition. Ludolph van Ceulen was born at Hildesheim, Germany, 28 January, 1540. Like many Germans during the Catholic Inquisitions, he emmigrated to The Netherlands. He taught Fencing and Mathematics in Delft until 1594, when he moved to Leiden and opened a Fencing School. In 1600 he was appointed to the Engineering School at Leiden, where he spent the remainder of his life teaching Mathematics, Surveying, and Fortification. He wrote several books, including one titled "On The Circle", in which he published his geometric findings. Ludolph's most famous student, Willebrord Snell

3. Poster Of Van_Ceulen
Ludolph Van Ceulen died 392 years ago 31st December 1610 Ludolph Van Ceulen is famed for his calculation of to 35 places. In Germany used to be called the Ludolphine number. Find out more at
http://www-history.mcs.st-and.ac.uk/Posters/1231.html
Ludolph Van Ceulen
died 392 years ago
31st December 1610 Ludolph Van Ceulen is famed for his calculation of to 35 places. In Germany used to be called the Ludolphine number Find out more at
http://www-history.mcs.st-andrews.ac.uk/history/

4. Ludolph Van Ceulen - Acapedia - Free Knowledge, For All
acapedia.org home acapedia feedback. Friends of Acapedia Ludolph van Ceulen. FromWikipedia, the free encyclopedia. (There is currently no text in this page).
http://acapedia.org/aca/Ludolph_van_Ceulen
var srl33t_id = '4200';

5. Ceulen, Ludolph Van
Catalog of the Scientific Community. ceulen, ludolph van. Note the creators of the Galileo Project and this catalogue
http://es.rice.edu/ES/humsoc/Galileo/Catalog/Files/ceulen.html
Catalog of the Scientific Community
Ceulen, Ludolph van
Note: the creators of the Galileo Project and this catalogue cannot answer email on genealogical questions.
1. Dates
Born: Hildesheim, Germany, 28 Jan. 1540
Died: Leiden, 31 December 1610
Dateinfo: Dates Certain
Lifespan:
2. Father
Occupation: A Merchant
Bosmans says that his father was in very modest condition, so that Van Ceulen's education stopped with elementary. I interpret this as poor.
3. Nationality
Birth: German
Career: Dutch
Death: Dutch
4. Education
Schooling: No University
No evidence of any university education. 5 Religion: Cal.
Nothing whatever is said; he must have conformed to the Calvinist church of the Netherlands.
5. Religion
Affiliation:
6. Scientific Disciplines
Primary: Mathematics
Van Ceulen computed pi to 20 decimal places, and later, using Archimedes method (to which he added devices to speed things up) to 33 and ultimately to 35 places. In this he made himself an expert in trigonometry.
7. Means of Support
Primary: Schoolmaster, Academic
1580: in Delft he was a fencing master and a teacher of mathematics.

6. Tentoonstelling Pi
te herdenken dat 400 jaar geleden ludolph van ceulen, samen met Simon Fransz. van Merwen, benoemd werd tot 'professor
http://bc.leidenuniv.nl/tentoonstelling/pi/inhoud.htm
Tentoonstellingen
Ludolph van Ceulen
en de berekening van het getal PI
Tentoonstelling in de Leidse Universiteitsbibliotheek van 4 - 18 juli 2000
Samengesteld door R.M.Th.E.Oomes
Inleiding
De levensloop van Ludolph van Ceulen
De vroege geschriften van Van Ceulen De grote hoofdwerken ... Ludolph van Ceulens grafsteen
Inleiding
Om te herdenken dat 400 jaar geleden Ludolph van Ceulen, samen met Simon Fransz. van Merwen, benoemd werd tot 'professor in de Nederduytsche Mathematycque' wordt door het Algorithmic Number Theory Symposium, 2-7 juli 2000, op 5 juli aandacht besteed aan Ludolph van Ceulen, de man die de wetenschappelijke wereld van zijn tijd verbaasde door het getal pi , de verhouding tussen de omtrek en de middellijn van een cirkel, in 35 decimalen te berekenen. Opmerkelijk was de wijze van publiceren: op zijn grafsteen in de Leidse Pieterskerk. Hoewel deze grafsteen in de eerste helft van de negentiende eeuw is verdwenen, ontvangen tot in onze tijd de VVV en het gemeentearchief regelmatig vragen naar deze steen. Het stemt tot voldoening, dat het Wiskundig Genootschap besloten heeft een gedenkteken in de Pieterskerk aan te brengen met de tekst van deze grafsteen. Al met al voor de Universiteitsbibliotheek voldoende aanleiding een kleine verzameling boeken tentoon te stellen over het werk van Van Ceulen, zijn medestanders en tegenstrevers. Aan het einde van de zestiende eeuw was het berekenen van pi immers een strijdperk dat door menigeen betreden werd. De zinspreuk van het Wiskundig Genootschap, opgericht in 1778, luidt: 'Een onvermoeide arbeid komt alles te boven'. Hoewel aan het berekenen van decimalen van

7. Peripheria - Ludolph Van Ceulen (1540-1610)
Biographie du mathematicien ludolph van ceulen (15401610) ludolph van ceulen, professeur de mathématiques et d'escrime allemand né le 28 janvier 1540 à Hildesheim en Allemagne,
http://www.peripheria.net/bios/ceulen
intro accueil / actualités
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histoire du nombre Pi
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Ludolph Van Ceulen (1540-1610)
[retour aux mathématiciens] (plus d'images) Ludolph Van Ceulen, professeur de mathématiques et d'escrime allemand né le 28 janvier 1540 à Hildesheim en Allemagne, mort 31 décembre 1610 à Leiden aux les Pays-Bas. Il enseigna l'escrime et les mathématiques à Delft, et en 1594, il ouvrit une école d'escrime à Leiden. En 1600 il fut nommé à l'école d'Ingénieur de Leiden. Pendant les dix dernières années de sa vie il enseigna l'arithmétique. Il est connu pour avoir calculé 35 décimales de pi, ce qu'il a fait en utilisant des polygones de 2 côtés. Il a passé la plupart de sa vie à faire cela, et il est normal que les 35 décimales soient gravées sur sa pierre tombale. Il a écrit un certain nombre de travaux, parmi lesquels Sur le cercle , deux de ces livres furent traduits en latin pour les rendre plus accessibles à la communauté des mathématiciens.

8. Pi In De Pieterskerk
Woensdag 5 juli 2000 is een gereconstrueerde grafsteen van ludolph van ceulen geplaatst in de Pieterskerk. ludolph van ceulen leefde in het begin van de 17de eeuw en heeft veel werk verricht voor het benaderen van Pi.
http://www.math.rug.nl/~top/pi-dag/6juli.html
Pi in de Pieterskerk
Op 5 juli 2000 werd door het Wiskundig Genootschap een Pi-dag in Leiden georganiseerd. De aanleiding hiertoe, tevens het feestelijk hoogtepunt van de dag, vormde de onthulling van een gedenksteen voor de wiskundige/schermmeester Ludolph van Ceulen . Aan het eind van de 16de en in het begin van de 17de eeuw heeft deze veel werk verricht aan het vinden van nauwkeurige benaderingen voor het getal pi . De gedenksteen, met daarop een reconstructie van de tekst die ooit op de verdwenen grafsteen van Van Ceulen heeft gestaan, werd ontworpen en gehakt door Cornelia Bakkum. De onthulling is gedaan door Zijne Koninklijke Hoogheid de Prins van Oranje. De Pi-dag bestond uit een middag- en een avondgedeelte; voor beide is het programma hier te vinden. Het middagprogramma had een wat meer wetenschappelijk karakter; het was onderdeel van het congres ANTS dat van 2 t/m 7 juli in Leiden wordt georganiseerd. Een fotoverslag van met name dit programmaonderdeel werd gemaakt door Rob Smit. Het avondprogramma vond plaats in de Pieterskerk te Leiden.

9. Ludolph Van Ceulen.
ludolph van ceulen. (1540 1610). 3 14159265358979323846264338327950288
http://www.quido.cz/osobnosti/ceulen.htm

10. References For Van_Ceulen
References for ludolph van ceulen. D Huylebrouck, ludolph van ceulen's15401610 tombstone, Math. Intelligencer 17 (4) (1995), 60-61.
http://www-gap.dcs.st-and.ac.uk/~history/References/Van_Ceulen.html
References for Ludolph van Ceulen
  • Biography in Dictionary of Scientific Biography (New York 1970-1990). Articles:
  • H Bosmans, Ludolphe van Ceulen,
  • D Huylebrouck, [Ludolph] van Ceulen's [1540-1610] tombstone, Math. Intelligencer
  • …sterreich. Akad. Wiss. Math.-Natur. Kl. Denkschr. 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/history/References/Van_Ceulen.html
  • 11. Van_Ceulen
    Biography of ludolph van ceulen (15401610) ludolph van ceulen. Born 28 Jan 1540 in Hildesheim, Germany
    http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Van_Ceulen.html
    Ludolph van Ceulen
    Born: 28 Jan 1540 in Hildesheim, Germany
    Died: 31 Dec 1610 in Leiden, Netherlands
    Click the picture above
    to see a larger version Show birthplace location Previous (Chronologically) Next Biographies Index Previous (Alphabetically) Next Main index
    Ludolph Van Ceulen does not appear to have had a university education as his parents were not sufficiently wealthy to pay for one. He held a number of posts not only as a teacher of mathematics but also as a fencing teacher. He taught fencing and mathematics in Delft, then in 1594, opened a fencing school in Leiden. In 1600 he was appointed to the Engineering School in Leiden. For the last ten years of his life he taught arithmetic, surveying and fortification in the engineering school. Van Ceulen is famed for his calculation of p to 35 places which he did using polygons with 2 sides. He spent most of his life doing this and it is fitting that the 35 places of p are engraved on his tombstone. In Germany p was called the Ludolphine number for a long time. Van Ceulen had several friends among the mathematicians of the time. In particular his friendships with Simon

    12. [HM] Ludolph Van Ceulen By Dick Klingens
    Subject HM ludolph van ceulen Author Dick Klingens dklingens@pandd.demon.nl Date Thu, 8 Jun 2000 063743 +0200
    http://mathforum.com/epigone/historia_matematica/doishingren
    [HM] Ludolph van Ceulen by Dick Klingens
    reply to this message
    post a message on a new topic

    Back to Historia-Matematica Discussion Group
    Subject: [HM] Ludolph van Ceulen Author: dklingens@pandd.demon.nl Date: Thu, 8 Jun 2000 06:37:43 +0200 On the July 5th, 2000 a memorial stone will be unveiled, honering Ludolph van Ceulen. The stone will be placed in the Pieterskerk (St. Pieter's Church) in Leiden (Netherlands) at the some spot as his lost gravestone. On the memorial stone Ludolph's 35 decimal digits of Pi will be engraved. In the afternoon and in the evening Pieter Borwein will give the Beeger lecture 2000 at the Leiden University (it's on Pi). The reveiling of the memory stone is an activity of the Wiskundig Genootschap (Dutch Mathematic Society) in connection with WMY2000. More information (in Dutch): http://www.math.rug.nl/~top/pi-dag/6juli.html http://www.pandd.demon.nl The Math Forum

    13. Roomen, Andriaan Van
    correspondence is now mostly lost. Early in his career he establisheda connection with ludolph van ceulen. He was acquainted with the
    http://es.rice.edu/ES/humsoc/Galileo/Catalog/Files/roomen.html
    Catalog of the Scientific Community
    Roomen, Andriaan van
    Note: the creators of the Galileo Project and this catalogue cannot answer email on genealogical questions.
    1. Dates
    Born: Louvain, 29 Sept. 1561
    Died: Mainz, 4 May 1615 He died in travel, as he returned from Würzburg to Louvain.
    Dateinfo: Dates Certain
    Lifespan:
    2. Father
    Occupation: Merchant
    Same name, a merchant.
    No indication of financial status.
    3. Nationality
    Birth: Belgian
    Career: Belgain, German, Polish
    Death: German
    4. Education
    Schooling: Louvain; M.A., M.D.
    He studied at the Jesuit College in Cologne.
    One source says that he studied medicine at Louvain and then somewhere in Italy (no university mentioned), where he completed an M.A. and M.D. It appears obvious from his career that he had an M.D., and thus the story appears plausible. I assume a B.A. or its equivalent.
    5. Religion
    Affiliation: He had to have been Catholic.
    6. Scientific Disciplines
    Primary: Mathematics
    Subordinate: Natural Philosophy, Astronomy, Medicine
    In Würzburg, where he was a professor of medicine and where he really created the medical faculty in a new university, he published a continuing series of medical theses defended by his students. They are all wholly traditional, and there is no indication at all that Roomen contributed to medical science. A prolific author, Roomen wrote also on astronomy and natural philosophy. As with medicine, his opinions in these fields were wholly traditional. After some thought, I list the three as subordinate disciplines.

    14. CEULEN, Ludolph Van, Vanden Circkel. Daer In Gheleert Werdt Te Vinden De Naeste
    ceulen, ludolph van vanden Circkel. van ceulen was an indefatigable computer andconcentrated on the computation of p, sometimes called ludolph's number
    http://www.polybiblio.com/watbooks/2506.html
    [bound with:] De Arithmetische en Geometrische fondamenten... In veele verscheydene constighe questien, soo geometrice door linien, als arithmetice door irrationale ghetallen, oock door den regel coss, ende de tafelen sinuum ghesolveert. Leiden, Joost van Colster and Jacob Marcus, 1615
    W. P. Watson Antiquarian Books
    The Calculation of p CEULEN, Ludolph van Vanden Circkel. Daer in gheleert werdt te vinden de naeste Proportie des Circkels-diameter tegen synen Omloop... Noch de Tafelen Sinuum, Tangentium, ende Secantium... Ten laetsten van Interest... Delft, Jan Andriesz, 1596
    [bound with:] De Arithmetische en Geometrische fondamenten... In veele verscheydene constighe questien, soo geometrice door linien, als arithmetice door irrationale ghetallen, oock door den regel coss, ende de tafelen sinuum ghesolveert. Leiden, Joost van Colster and Jacob Marcus, 1615 Delft, Jan Andriesz, 1596 2 vols in one, folio, I: ff [6] 72 [pp 73-76] 77-113 [1], with engraved portrait of author on title by J. Eilegen incorporating Ceulen's computation of p to 20 decimal places, black letter, numerous woodcut diagrams in text; II: [iv] 271 (second leaf of prelims bound between pages 8 and 9), with woodcut diagram on title (see below); a few early marginal annotations to first work, some light waterstains to title and a few gatherings of second work, a fine copy in contemporary Dutch yapped vellum, upper joint split at top. £7500
    First editions of Van Ceulen's two most important works, principally concerned with the calculation of p. Originally from Germany, Ceulen (1540-1610) spent most of his life in Holland and was one of the most important Dutch mathematicians of his time. His influence continued through his pupil Willebrord Snel, who translated and edited his works.

    15. VAN CUREN FAMILY HOME PAGE
    Includes many related familiesCategory Society Genealogy Personal Pages V...... DESCENDANTS OF MATHIJS van ceulen, BOOK ORDER PAGE. van KEULEN CHARTMAKERS OF AMSTERDAM.ludolph van ceulen, MATHEMATICIAN. DUTCH SOLDIERS ON SKATES. JANSEN FAMILY.
    http://www.angelfire.com/id/vancuren/home.html
    VAN CUREN FAMILY HOME PAGE
    In the 1500s, Spain was engaged in a "spiritual cleansing" known as the "Inquisition". To non-Catholics, this usually meant Imprisonment, torture, and/or execution. As the Spanish began conquering Western Europe, many were forced to flee to the safety of the Dutch States. Such is the case of Cologne, which fell to Spain in 1559. As a matter of identification, wealthy classes from Cologne often attached the suffix "van Ceulen"(also van Keulen) to their names, which literally means "of Cologne". Eventually, "van" names became recognized as surnames, and thus, the van Keulen/van Ceulen family was created. Mathijs Jansen Van Ceulen, 1602-1648, first arrived in North America(New York) in June, 1639 aboard the West India Raven from Recife, Brazil. He was found in New Amsterdam(Manhattan)in until Aug, 1639, then back in Recife until 1641. By late 1641 he had made Fort Orange(aka Albany, NY) his permanent home. He was one of the 19 Lord-Directors of the Dutch West India Trading Company, empowered with the Armorial Bearings of an Earl, and known as one of the co-Patroons of Zawaanendal (Tenant-farm Colony-Swan Valley, Delaware River, near Lewes). The Dutch colonies at New Netherlandt proved to be a dismal failure and were eventually taken over by the British in 1664, at which time it was renamed New York. Mathijs' land and estate were confirmed to his heirs in 1667, including a parcel of 50 Morgens of land in the Pappermemmins (Manhats - Manhattan) known as

    16. Math Forum - Ask Dr. Math
    References for the biography of ludolph van ceulen
    http://forum.swarthmore.edu/dr.math/problems/hammond11.2.98.html

    Associated Topics
    Dr. Math Home Search Dr. Math
    Ludolph van Ceulen and Pi
    Date: 11/02/98 at 02:19:09 From: Ryan Hammond Subject: Ludolph van Ceulen and pi Dear Dr. Math, For a class I was asked to find out about a certain mathematican. I'm looking for information on Ludolph van Ceulen. The Internet site I went to said he approximated pi to the first 35 digits by inscribing polygons in a circle. 1) How do you figure out pi this way? The site also said he used polygons with 2 to the 62nd power sides. My friend said that making a polygon with this many sides is impossible by human hand. And then he gave a reasonable argument. 2) So my second question is how did van Ceulen make such a large polygon? http://mathforum.org/dr.math/ Associated Topics
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    17. Tentoonstelling Pi
    Tentoonstellingen. ludolph van ceulen en de berekening van het getalPI. 1. De levensloop van ludolph van ceulen. ludolph van ceulen
    http://bc.leidenuniv.nl/tentoonstelling/pi/object1.htm
    Tentoonstellingen
    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
    1. De levensloop van Ludolph van Ceulen
    R.M.Th.E. Oomes
    1 Joannes Meursius, Athenae Batavae, sive De urbe Leidensi et academia, virisque claris, qui utramque ingenio suo, atque scrip- tis, illustrarunt, libri duo. Lugduni Batavorum, apud Andream Cloucquium et Elsevirios, 1625. 662 C 10 P. 343 bevat een portret van Van Ceulen, op p. 344-345 staan gegevens over zijn persoon, waaraan hierboven veel is ontleend.

    18. Van_Ceulen Portrait
    ludolph van ceulen. JOC/EFR August 2001
    http://www-history.mcs.st-and.ac.uk/history/PictDisplay/Van_Ceulen.html
    Ludolph van Ceulen
    JOC/EFR August 2001 The URL of this page is:
    http://www-history.mcs.st-andrews.ac.uk/history/PictDisplay/Van_Ceulen.html

    19. Math Forum - Ask Dr. Math
    How did ludolph van ceulen estimate pi by inscribing and circumscribinga circle with squares? Drexel ludolph van ceulen and Pi. Date
    http://mathforum.org/library/drmath/view/52555.html

    Associated Topics
    Dr. Math Home Search Dr. Math
    Ludolph van Ceulen and Pi
    Date: 11/02/98 at 02:19:09 From: Ryan Hammond Subject: Ludolph van Ceulen and pi Dear Dr. Math, For a class I was asked to find out about a certain mathematican. I'm looking for information on Ludolph van Ceulen. The Internet site I went to said he approximated pi to the first 35 digits by inscribing polygons in a circle. 1) How do you figure out pi this way? The site also said he used polygons with 2 to the 62nd power sides. My friend said that making a polygon with this many sides is impossible by human hand. And then he gave a reasonable argument. 2) So my second question is how did van Ceulen make such a large polygon? http://mathforum.org/dr.math/ Associated Topics
    High School Geometry

    High School History/Biography

    High School Triangles and Other Polygons

    Middle School Geometry
    ...
    Middle School Triangles and Other Polygons

    Search the Dr. Math Library:
    Find items containing (put spaces between keywords):
    Click only once for faster results:
    [ Choose "whole words" when searching for a word like age.

    20. [HM] Ludolph Van Ceulen By Dick Klingens
    HM ludolph van ceulen by Dick Klingens. reply to this message post amessage on a new topic Back to HistoriaMatematica Discussion Group
    http://mathforum.org/epigone/historia_matematica/doishingren
    [HM] Ludolph van Ceulen by Dick Klingens
    reply to this message
    post a message on a new topic

    Back to Historia-Matematica Discussion Group
    Subject: [HM] Ludolph van Ceulen Author: dklingens@pandd.demon.nl Date: Thu, 8 Jun 2000 06:37:43 +0200 On the July 5th, 2000 a memorial stone will be unveiled, honering Ludolph van Ceulen. The stone will be placed in the Pieterskerk (St. Pieter's Church) in Leiden (Netherlands) at the some spot as his lost gravestone. On the memorial stone Ludolph's 35 decimal digits of Pi will be engraved. In the afternoon and in the evening Pieter Borwein will give the Beeger lecture 2000 at the Leiden University (it's on Pi). The reveiling of the memory stone is an activity of the Wiskundig Genootschap (Dutch Mathematic Society) in connection with WMY2000. More information (in Dutch): http://www.math.rug.nl/~top/pi-dag/6juli.html http://www.pandd.demon.nl The Math Forum

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