Spiru Haret
Spiru Haret (born February 15, 1851 in Iași , † December 17, 1912 in Bucharest ) was a Romanian mathematician and Minister of Education.
Haret was of Armenian descent. He studied physics and mathematics at the University of Bucharest from 1869, graduating in 1874, interrupted by a year in which he worked as a teacher. He then continued his studies at the Sorbonne and received his doctorate in 1878 (Sur l'invariabilité des grandes axes des orbites planétaires, On the immutability of the great axes of the planetary orbits). In the same year he returned to Bucharest and became a professor of mechanics. There he turned away from research and focused on reforming the educational system. From 1897 to 1899, from 1901 to 1904 and from 1907 to 1910 he was Minister of Education. He kept his professorship (and an additional professorship at an engineering school) until 1910.
In his dissertation he showed that the major axes of the planetary orbits in the solar system are not stable in the third order perturbation theory (with regard to the perturbation by the other planets). Joseph-Louis Lagrange and Pierre-Simon Laplace had previously shown stability in 1st order perturbation theory and Siméon Denis Poisson in 2nd order. The result inspired Henri Poincaré to conduct his own investigations into the stability of the solar system.
He founded the Astronomical Observatory in Bucharest.
In 1911 he published a book on the application of mathematics to social questions (Mecanique sociale).
A private university based in Bucharest and an earth's moon crater are named after him.
literature
- Spiru Haret, Laws and Normative Acts on School and Education. An Anthology, With an Introductory Study By Constantin Schifirneț, Cluj-Napoca: Presa Universitară Clujeană, 2014
Web links
- John J. O'Connor, Edmund F. Robertson : Spiru Haret. In: MacTutor History of Mathematics archive .
- Constantin Schifirneţ: Spiru Haret, Education and School Legislation Reform , “Revista română de sociologie”, serie nouă, anul XXV, no. 3-4, pp. 311–326, 2014 http://www.revistadesociologie.ro/pdf-uri/nr.3-4-2014/07-CSchifirnet.pdf
Individual evidence
- ^ Armenia in Romania
- ↑ Armenian personalities in Romania on the website of the Armenian Church in Iași , accessed on July 13, 2014 (Romanian).
- ↑ The Haret crater at astrolink.de
| personal data | |
|---|---|
| SURNAME | Haret, Spiru |
| BRIEF DESCRIPTION | Romanian mathematician |
| DATE OF BIRTH | February 15, 1851 |
| PLACE OF BIRTH | Iași |
| DATE OF DEATH | December 17, 1912 |
| Place of death | Bucharest |