Pieter van Geer

Pieter van Geer

Pieter van Geer (born June 27, 1841 in Leiden , † October 3, 1919 in The Hague ) was a Dutch mathematician.

Life

His parents were the former blacksmith and manufacturer Pieter van Geer (born January 19, 1808 in Leiderdorp) and Maria Catharina Cockuijt (also: Cockuyt, born February 3, 1809 in Berkel, † March 12, 1876 in Boxmeer, married October 24 1837 in Zoeterwoude). Van Geer received his elementary lessons in Leiden and enrolled on September 21, 1858 as a student of philosophy at the University of Leiden . On October 24, 1862, he received his doctorate there under Frederik Kaiser with the mathematical subject De geodetic lijnen op de ellipsoïde for a doctorate in philosophical sciences. Thereupon received a teaching position in Delft and was appointed on January 22, 1867 to the extraordinary professor of mathematics and mechanics at the University of Leiden. He took on this task on March 23, 1867 with the inaugural speech De ontwikkeling van den geest, het highest doel van de beoefening der wiskunde . On January 24, 1877, he became a full professor in the field mentioned. His lectures mainly dealt with statements on geometry and theoretical mechanics.

In addition, he also participated in the organizational tasks of the university, was brief in 1877 and in 1882/83 acting rector of the Alma Mater . He put down the last task with the speech Philosophiae naturalis principia mathematica . He was also a Knight of the Order of the Dutch Lion . Van Geer was considered vain, which made it difficult to deal with. He is also known to love music. He was also committed to primary education and to widows and orphans of officers. On July 2, 1902, he retired for health reasons and retired on September 15, 1902. He then devoted himself to the history of mathematical science, about which he occasionally gave lectures in Leiden.

family

Van Geer married Adriana Catharina Kleyn van Willigen (* around 1844 in Delft) in Delft on April 17, 1867, the daughter of the businessman François Cornelis Kleijn van Willegen (* December 30, 1813 in Delft; † December 30, 1896 in Ginneken and Bavel) and his wife Maria Petronella van der Willigen (born November 14, 1817 in Rotterdam; † July 11, 1893 in Ginneken and Bavel, married July 11, 1838 in Rotterdam). There are children from the marriage. We know of these:

• Pieter van Geer (born February 16, 1870 in Leiden)
• Willem van Geer (* 1872 in Leiden) married. on April 5, 1923 in Rotterdam with Luise Wilhelmine Christine Biebrichter
• Francois Cornelis van Geer (born July 22, 1873 in Leiden, † April 30, 1941 in Amsterdam) married. I. May 30, 1912 in Amsterdam with Woutrina Johanna Hendrika Cornelia Hacke (born November 4, 1887 in Amsterdam, † February 17, 1924 ibid) married. II. October 25, 1932 in Amsterdam with Petronella Magdalena Lieftinck (born September 23, 1881 in Rauwerd)

Works (selection)

• De geodetic lines op de ellipsoïde. Leiden 1862
• Leerboek The Analytical Meet Art. Leiden 1864
• Ontwikkeling van den geest, het highest doel van de beoefening the science. Leiden 1867 ( online )
• Lobatto's leerboek der Rechtslijnige en bolvormige driehoeksmeting. Schoonhoven 1869
• Frederik Kaiser. Een woord van herinnering uitgesproken bij de heropening of the academische lessen. 1872
• Onderzoek eener bijzondere omstandigheid the central movement. Leiden 1872
• Leerboek the meet customer. 1876
• Het wetsontwerp-Kappeyne en het regeeringsverslag omtrent het lager onderwijs. Leiden 1878
• Advies van den hoogleraar P. van Geer omtrent het kunstenaarsfonds der Maatschappij tot bevordering der Toonkunst. 1887
• Philosophiae naturalis principia mathematica. Redevoering op the 308th annual course of the Leidsche Universiteit, 8 february 1883. Leiden 1883
• Basics of the synthetic meet customer. 1901
• Ons hooger onderwijs. Naar aanleiding van het ingediende wetsontwerp. 1903

literature

• Onze Hoogleeraren. Portretten en Biografieën. Nijgh & van Ditmar, Rotterdam, 1898 ( online )
• Gerrit van Dijk: Leidse hoogleraren Wiskunde 1575-1975. Universiteit Leiden, Mathematisch Instituut, 2011, ISBN 978-90-817201-1-3 , p. 50 ( OnlinePDF )
• Laurentius Knappert: PROF. DR. P. VAN GEER. In: Jaarboekje voor Geschiedenis en Oudheidkunde van Leiden en Rijnland. PJ Mulder & Zoon, Leiden 1920, pp. LXXXIII-LXXXV ( OnlinePDF )

Web link

• Record at the digital library of Dutch literature