The Essai sur le Calcul de Généralisation stands as the definitive treatise of Gabriel Oltramare, who spent over five decades influencing the academic landscape of Geneva. Born in 1816, he bridged the gap between early nineteenth-century number theory and the evolving demands of mathematical analysis, while simultaneously shaping the institutional structure of Swiss scientific discourse through his extensive political and administrative involvement.
Early Education and Egyptian Tenure
Oltramare pursued mathematics and natural sciences in his native Geneva between 1836 and 1839. He expanded his training at the University of Paris and the College of Sorbonne, where he earned a licence ès sciences mathématiques in 1840. Before establishing his career in academia, he spent 1843 to 1844 in Egypt serving as a tutor for Isma'il, the son of Ibrahim Pasha, representing the Muhammad Ali dynasty.
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Upon returning to Switzerland, Oltramare secured several teaching positions. He served as a privat-docent of mechanics at Geneva's industrial school from 1845 until 1870. His primary academic home became the University of Geneva, where he was appointed professor ordinarius of higher mathematics in 1848, holding the position until 1900. Additionally, he taught at the Collège de Genève from 1848 to 1850.
Mathematical Contributions
His early research focused on number theory, specifically exploring connections between linear and quadratic forms of prime numbers, as detailed in his 1855 Note sur les relations qui existent entre les formes linéaires et les formes quadratiques des numbers premiers. Later, his focus shifted toward mathematical analysis. He also authored scientific articles concerning meteorology and astronomy.
Institutional and Political Leadership
Beyond his research, Oltramare was a key figure in the governance of Geneva. He held membership in the Conseil administratif de Genève in 1848 and served in the Grand Council of Geneva from 1848 to 1854, often presiding over its sessions. He helped found the Institut national genevois in 1853 and chaired its natural sciences section from 1894 to 1902. In 1897, he assisted in organizing the inaugural International Congress of Mathematicians held in Geneva.
Fast facts
- Born: 1816, Geneva
- Died: 1906, Geneva
- Citizenship: Switzerland
- Education: University of Paris, College of Sorbonne
- Primary Employer: University of Geneva (1848-1900)
- Religion: Reformed
- Major Work: Essai sur le Calcul de Généralisation (1893)
Questions readers ask
What subjects did Oltramare teach?
He taught higher mathematics and mechanics.
Which languages did Oltramare use for his professional work?
He primarily operated in French, and his 1893 treatise was translated into Russian in 1895.
Achievements
- Held posts at University of Geneva
- Fields: mathematics, algebra and mathematical analysis
