• Thumbnail for Ludolph van Ceulen
    Ludolph van Ceulen (German: [ˈluːdɔlf fan ˈkɔʏlən], Dutch: [ˈlydɔl(ə) fɑŋ ˈkøːlə(n)]; 28 January 1540 – 31 December 1610) was a German-Dutch mathematician...
    9 KB (935 words) - 18:53, 21 September 2024
  • van Ceulen (I) (1593–1661), Dutch/English portrait painter Cornelis Janssens van Ceulen (II) (1634–1715), Dutch/English painter Ludolph van Ceulen (1540–1610)...
    579 bytes (93 words) - 02:04, 18 December 2018
  • Thumbnail for Cornelius Janson van Ceulen the Younger
    Cornelis Jonson van Ceulen the Younger (1634–1715), was an English painter active in the Dutch Republic. He was born in London as the son of the English...
    2 KB (179 words) - 02:48, 24 September 2024
  • Thumbnail for Cornelius Johnson (artist)
    Cornelius Johnson (born Cornelis Janssens van Ceulen, Dutch: [kɔrˈneːlɪ ˈɕɑnsəns fɑŋ ˈkøːlə(n)]; bapt. 14 October 1593 – bur. 5 August 1661) was an English...
    29 KB (3,306 words) - 12:26, 21 September 2024
  • Archimedes Liu Hui Zu Chongzhi Aryabhata Madhava Jamshīd al-Kāshī Ludolph van Ceulen François Viète Seki Takakazu Takebe Kenko William Jones John Machin William...
    25 KB (5,785 words) - 05:45, 2 October 2024
  • Thumbnail for Proof that 22/7 exceeds π
    Archimedes Liu Hui Zu Chongzhi Aryabhata Madhava Jamshīd al-Kāshī Ludolph van Ceulen François Viète Seki Takakazu Takebe Kenko William Jones John Machin William...
    13 KB (2,784 words) - 13:00, 26 July 2024
  • enterprise for many centuries. For example, German mathematician Ludolph van Ceulen of the 16th century spent a major part of his life calculating the first...
    40 KB (3,555 words) - 23:32, 17 October 2024
  • Thumbnail for Telangiectasia
    Book. Amsterdam: Elsevier Academic Press. p. 157. ISBN 978-0-12-369515-4. Ceulen, Roeland P.M.; Sommer, Anja; Vernooy, Kevin (2008). "Microembolism during...
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  • Thumbnail for John Milton
    Portrait of Milton at age 10 in Milton's Cottage, Chalfont St Giles, Buckinghamshire, painted by Cornelis Janssens van Ceulen...
    99 KB (12,201 words) - 00:15, 4 November 2024
  • Thumbnail for Jasper Schade van Westrum
    that of his wife Cornelia Strick van Linschoten, by Cornelis Jonson van Ceulen, a Dutch painter who had himself just returned from London. Pendants with...
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  • Thumbnail for Hildesheim
    supermodel and actress, who played Helen in the film Troy Ludolph van Ceulen (1540–1610), a German-Dutch mathematicianl he emigrated to the Netherlands...
    38 KB (4,279 words) - 09:17, 25 October 2024
  • Archimedes Liu Hui Zu Chongzhi Aryabhata Madhava Jamshīd al-Kāshī Ludolph van Ceulen François Viète Seki Takakazu Takebe Kenko William Jones John Machin William...
    9 KB (1,509 words) - 08:03, 4 September 2024
  • Thumbnail for Indiana pi bill
    Archimedes Liu Hui Zu Chongzhi Aryabhata Madhava Jamshīd al-Kāshī Ludolph van Ceulen François Viète Seki Takakazu Takebe Kenko William Jones John Machin William...
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  • Loschmidt constant – Johann Josef Loschmidt Ludolphsche Zahl – Ludolph van Ceulen Mean of Phidias (golden ratio, ϕ {\displaystyle \phi } , phi) – Phidias...
    5 KB (500 words) - 23:13, 7 October 2024
  • Archimedes Liu Hui Zu Chongzhi Aryabhata Madhava Jamshīd al-Kāshī Ludolph van Ceulen François Viète Seki Takakazu Takebe Kenko William Jones John Machin William...
    20 KB (2,549 words) - 01:56, 13 April 2024
  • at 15 decimal places in 1593. In 1596, Dutch mathematician Ludolph van Ceulen reached 20 digits, a record he later increased to 35 digits (as a result...
    148 KB (17,578 words) - 10:10, 1 November 2024
  • Thumbnail for Christiaan Huygens
    Huygens completed his design in 1680 and had his clockmaker Johannes van Ceulen built it the following year. However, Colbert passed away in the interim...
    135 KB (14,145 words) - 04:08, 7 November 2024
  • Thumbnail for Ann, Lady Fanshawe
    There is a portrait in oils of Lady Fanshawe by Cornelis Janssens van Ceulen held at the Valence House Museum in Dagenham, London, a gift from a descendant...
    15 KB (1,858 words) - 15:21, 29 August 2024
  • For a unit circle we have the famous doubling equation of Ludolph van Ceulen, c 2 n = 2 + c n . {\displaystyle c_{2n}={\sqrt {2+c_{n}}}.} If we now circumscribe...
    37 KB (5,885 words) - 07:37, 5 November 2024
  • Dutch radio astronomer MPC · 10437 10438 Ludolph 6615 P-L Ludolph van Ceulen (1540–1610), Dutch mathematician who calculated the value of Pi to 35 decimal...
    178 KB (428 words) - 14:39, 13 October 2024
  • Thumbnail for Lindemann–Weierstrass theorem
    Archimedes Liu Hui Zu Chongzhi Aryabhata Madhava Jamshīd al-Kāshī Ludolph van Ceulen François Viète Seki Takakazu Takebe Kenko William Jones John Machin William...
    28 KB (4,778 words) - 23:00, 4 November 2024
  • Archimedes Liu Hui Zu Chongzhi Aryabhata Madhava Jamshīd al-Kāshī Ludolph van Ceulen François Viète Seki Takakazu Takebe Kenko William Jones John Machin William...
    3 KB (159 words) - 13:56, 14 September 2024
  • Thumbnail for Jacobean era
    claim, as part of this trend, Cornelius Johnson, or Cornelis Janssens van Ceulen (1593–1661), born and trained in London and active through the first two...
    21 KB (2,679 words) - 02:47, 9 August 2024
  • public debate, which indeed took place in 1596 between him and Pieter van Ceulen. After 56 long sessions both parties declared their own victory. He took...
    2 KB (267 words) - 09:50, 30 October 2021
  • Van Keulen is a Dutch toponymic surname meaning "from Cologne". Van Ceulen is an archaic spelling variant. People with this name include: Ada van Keulen...
    1 KB (190 words) - 03:50, 31 May 2023
  • Archimedes Liu Hui Zu Chongzhi Aryabhata Madhava Jamshīd al-Kāshī Ludolph van Ceulen François Viète Seki Takakazu Takebe Kenko William Jones John Machin William...
    44 KB (8,691 words) - 04:11, 13 October 2024
  • Thumbnail for Early life of John Milton
    John Milton at age 10 by Cornelis Janssens van Ceulen...
    30 KB (4,496 words) - 20:19, 7 April 2024
  • Thumbnail for George Villiers, 1st Duke of Buckingham
    his collar and cuffs in the full-length portrait by Cornelis Janssens van Ceulen. and the head and shoulders by Anthony van Dyck. The 1625 painting by Michiel...
    67 KB (7,258 words) - 03:50, 5 November 2024
  • Thumbnail for Christopher Hatton, 1st Viscount Hatton
    A 1641 painting of Christopher Hatton by Cornelis Janssens van Ceulen...
    6 KB (520 words) - 14:29, 18 July 2024
  • Thumbnail for Antony House
    One of the portraits held at Antony House: Thomas Coventry, 1st Baron Coventry by Cornelis Janssens van Ceulen...
    8 KB (663 words) - 09:58, 26 January 2024