Gabriel Oltramare (19 July 1816,

Geneva Geneva ( ; french: Genève ) frp, Genèva ; german: link=no, Genf ; it, Ginevra ; rm, Genevra is the List of cities in Switzerland, second-most populous city in Switzerland (after Zürich) and the most populous city of Romandy, the French-speaki ...

– 10 April 1906, Les Eaux-Vives, ''quartier'', Geneva) was a Swiss mathematician, known for his book "Essai sur le Calcul de Généralisation". Oltramare studied mathematics and natural sciences in Geneva from 1836 to 1839 and then studied higher mathematics at the

Sorbonne Sorbonne may refer to: * Sorbonne (building), historic building in Paris, which housed the University of Paris and is now shared among multiple universities. *the University of Paris (c. 1150 – 1970) *one of its components or linked institution, ...

, receiving there his ''licence ès sciences mathématiques'' in 1840. He was a teacher in

Aarau Aarau (, ) is a List of towns in Switzerland, town, a Municipalities of Switzerland, municipality, and the capital of the northern Swiss Cantons of Switzerland, canton of Aargau. The List of towns in Switzerland, town is also the capital of the dis ...

. He was in Egypt from 1843 to 1844 as a tutor for

Isma'il Ismail ( ar, إِسْمَاعِيْل, ʾIsmāʿīl) is regarded as a prophet and messenger and the ancestor to the Ishmaelites in Islam. He is the son of Ibrahim (Abraham), born to Hajar (Hagar). Ismail is also associated with Mecca and the ...

, son of Ibrahim Pasha of the Muhammad Ali dynasty. At the

Collège de Genève In France, secondary education is in two stages: * ''Collèges'' () cater for the first four years of secondary education from the ages of 11 to 15. * ''Lycées'' () provide a three-year course of further secondary education for children between ...

. Oltramare was ''privat-docent'' of mechanics from 1845 to 1870 and simultaneously of mathematics from 1848 to 1850. In 1848 he was appointed professor ordinarius of higher mathematics at the

University of Geneva The University of Geneva (French: ''Université de Genève'') is a public research university located in Geneva, Switzerland. It was founded in 1559 by John Calvin as a theological seminary. It remained focused on theology until the 17th centu ...

. At the beginning of his career he did research on number theory. According to

Henri Fehr Henri Fehr (Zurich, 2 February 1870 – Geneva, 2 November 1954) was a Swiss mathematician. He was the founder of the Foundation for the Advancement of Mathematical Sciences, of the journal " Commentarii Mathematici Helvetici" and of the journal ...

, the most important of these articles on number theory is the 1855 ''Note sur les relations qui existent entre les formes linéaires et les formes quadratiques des numbers premiers''. Later in his career Oltramare worked on mathematical analysis. In 1893 he published his treatise ''Essai sur le calcul de généralisation'', with 2nd edition in 1899 and a Russian translation in 1895. He published several articles on astronomy and meteorology in scientific journals. He was one of the founders in 1853 of the ''Institut national genevois'' and presided from 1894 to 1902 over its section of natural sciences. He was a member in 1848 of the ''Conseil administratif de Genève'' and member from 1848 to 1854 of the ''Grand Conseil de Genève'', over which he presided several times. He was one of the organizers of the first

International Congress of Mathematicians The International Congress of Mathematicians (ICM) is the largest conference for the topic of mathematics. It meets once every four years, hosted by the International Mathematical Union (IMU). The Fields Medals, the Nevanlinna Prize (to be rename ...

, which was held in Geneva in 1897.

References

{{DEFAULTSORT:Oltremare, Gabriel 1816 births 1906 deaths 19th-century Swiss mathematicians College of Sorbonne alumni University of Geneva faculty