Biography
He was born in Botoşani, the son of Vlad Onicescu, from Ştefăneşti, Botoşani, and Ana, from Oniceni, Neamţ County. He graduated from the Botoşani August Treboniu Laurian Lyceum in 1911 with a perfect score of 10. That same year, he entered the University of Bucharest, from where he graduated with degrees in Mathematics and Philosophy in 1913. From 1914 to 1916 he was a mathematics teacher at the military gymnasium of Dealu Monastery, near Târgovişte. From 1916 to 1918 he fought in World War I.
In 1919, Onicescu went to study geometry at the University of Rome, under the guidance of Tullio Levi-Civita. He earned his Ph.D. in June, 1920 for a thesis titled Sopra gli spazi einsteiniani a gruppi continui di transformazione ("On Einstein manifolds and groups of continuous transformations"). The thesis, which dealt with problems in differential geometry related to Albert Einstein's theory of relativity, was defended in front of a jury of 11 mathematicians, including Levi-Civita, Vito Volterra, and Guido Castelnuovo.
In the Fall of 1920 he went to Paris, where he gave talks in Jacques Hadamard's seminar at the Collège de France. While in Paris, he organized a seminar with other Romanian mathematicians, including Petre Sergescu, Şerban Gheorghiu, Alexandru Pantazi, and Şerban Coculescu.
In 1922, he returned to Bucharest, where he embarked on a 40-year long university career. In 1924, he started teaching the first college-level probability theory course in Romania. From 1928 on, he was professor at the Faculty of Sciences of the University of Bucharest, and was appointed full professor in 1931. In 1930, he organized the School of Statistics and established an Institute of Calculus, serving as its director for many years. In 1936 he entered the Legionary Movement. The Romanian poet and mathematician Ion Barbu (Dan Barbilian) was a close friend of his.
He was elected corresponding member of the Romanian Academy in 1933, and became full member on February 4, 1965. He was in charge of the Probability Theory section of the Institute of Mathematics of the Romanian Academy.
He died in Bucharest on the eve of his 91st birthday, after a short illness.
Read more about this topic: Octav Onicescu
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