Jacob de Gelder

Jacob de Gelder (born November 22, 1765 in Rotterdam , † October 10, 1848 in Leiden ) was a Dutch mathematician who played a special role in the reform of mathematics teaching in the Netherlands and wrote many school books for mathematics.

Jacob de Gelder

Life

De Gelder was an arithmetic master (accountant) and math teacher in Amsterdam and began publishing in 1791. During the revolutionary years he lost most of his students and had to look for other sources of income. From 1802 to 1806 he worked as a surveyor for the land survey of the Netherlands under General Kraijenhoff, from 1807 to 1810 he taught the royal pages in mathematics and in 1811 he worked in the tax office. He lived partly in The Hague and partly in Amsterdam and was active in the local mathematical societies in both cities. He soon became popular through mathematics books and advocated mathematics teaching in as many schools as possible. In 1815 he became professor of mathematics at the newly founded military academy in Delft. There, however, there was a conflict with the commandant over the extent of the theoretical lessons, so that he was suspended in 1819. In 1819 he became associate professor and in 1824 professor at the University of Leiden. He also taught at the Latin School (until he had to give up because of an argument with the Rector) and at the Industrial School Descriptive Geometry. In 1840 he retired and was knight of the Order of the Dutch Lion in the same year.

He was married to Catharina van Rooijen since 1792 and has eight children with her, only one of whom reached adulthood.

literature

• Danny Beckers: Mathematics as a way of life. A biography of the mathematician Jacob de Gelder (1765–1848), Nieuw Archief voor Wiskunde, Volume 14, 1996, pp. 275–298

Fonts

• Ludeman in zijn waar karakter, of de grondstellingen of astrology, aan de beginzelen der zuivere speech killed, The Hague 1799
• Redevoering over de wars aart en voortreffelijkheid der wiskunst, The Hague 1806
• Handleiding tot de beschouwende en werkdadige meetkunst, Amsterdam 1806
• Beginselen der meetkunst, The Hague / Amsterdam 1810
• Knowledgeable Analysis, 1811-1813
• Very first gronden der cijferkunst, opgesteld th gebruike der scholen en kollegiën, The Hague / Amsterdam, 1812–1814
• Proeve over den Waren aart van den positieven en negatieven toestand der grootheden in de stelkunst en in de toepassing van denzelven op de meetkunst, The Hague / Amsterdam 1815
• Beschrijving van de inrigting en het gebruik van den sextant van Hadley, The Hague / Amsterdam 1816
• Very first gronde der bewouwende en werkdadige meetkunst, The Hague / Amsterdam 1816
• Beginselen der stelkunst, The Hague / Amsterdam 1817
• Beginning of the differential, integral and variatierekening, The Hague / Amsterdam 1823
• Hoogere meetkunst, The Hague / Amsterdam 1824
• Negotiating over het verband en the zamenhang der natuurlijke en zedelijke wetenschappen, en over de wijze om zich dezelve own te maken en aan other meede te deelen, The Hague / Amsterdam 1826
• Very first gronde of stel art, th gebruike der latijnsche scholen en other colleges, The Hague / Amsterdam 1827
• First gronde of the art of meeting, th gebruike der latijnsche scholen en other colleges, The Hague / Amsterdam 1827
• Handleiding tot het meetkunstig teekenen, The Hague / Amsterdam 1829
• Cosmographic lessen, The Hague / Amsterdam 1831
• Concerns about the negotiating over de meetkundige bepalingen van den hoogleeraar JFL Schröder, The Hague / Amsterdam 1835
• Uitvoerige lessen over verhoudingen en evenredigheden, The Hague / Amsterdam 1839

Web links

• Dutch biography of Danny Beckers