Dmitri Egorov

Dmitri Egorov
Born	22 December 1869(1869-12-22) Moscow, Russian Empire
Died	September 10, 1931(1931-09-10) (aged 61) Kazan, Soviet Union
Citizenship	Russian Empire, Soviet Union
Nationality	Russian
Fields	Mathematics
Institutions	Moscow State University
Alma mater	Lomonosov University
Doctoral advisor	Nikolai Bugaev
Doctoral students	Pavel Alexandrov Nikolai Luzin Ivan Petrovsky Ivan Privalov Adolf Yushkevich
Known for	works on differential geometry and mathematical analysis, Egorov's Theorem, president of the Moscow Mathematical Society.

Dmitri Fyodorovich Egorov (Russian: Дми́трий Фёдорович Его́ров; December 22, 1869, Moscow, Russia – September 10, 1931, Kazan, Soviet Union) was a Russian and Soviet mathematician known for significant contributions to the areas of differential geometry and mathematical analysis.

Life

Egorov held spiritual beliefs to be of great importance, and openly defended the Church against Marxist supporters after the Russian Revolution. He was elected president of the Moscow Mathematical Society in 1921, and became director of the Institute for Mechanics and Mathematics at Moscow State University in 1923. However because of Egorov's stance against the repression of the Church, he was dismissed from the Institute in 1929 and publicly rebuked. In 1930 he was arrested and imprisoned as a "religious sectarian", and soon after was expelled from the Moscow Mathematical Society. Upon imprisonment, Egorov began a hunger strike until he was taken to the prison hospital, and eventually to the house of fellow mathematician Nikolai Chebotaryov where he died.

Research work

Egorov studied potential surfaces and triply orthogonal systems, and made significant contributions to the broader areas of differential geometry and integral equations. His work influenced that of Jean Gaston Darboux on differential geometry and mathematical analysis. A theorem in real analysis and integration theory, Egorov's Theorem, is named after him.^[1]

Students

Egorov's students included:

• Pavel Alexandrov
• Nikolai Luzin
• Ivan Petrovsky
• Ivan Privalov
• Adolf Yushkevich

See also

• Egorov's theorem

Notes

1. ^ He published a proof of this theorem in the short paper Egoroff 1911, and the result become widely acknowledged under his name. Carlo Severini published a proof of the same result a year before, in the paper Severini 1910: however, the work of Severini was unnoticed until Leonida Tonelli recalled the attention on it (see the entry about Carlo Severini for further details).

Bibliography

• Kuznetsov, P. I. (1971), "Dmitrii Fedorovich Egorov (on the centenary of his birth)" (in Russian), Uspekhi Matematicheskikh Nauk 26 (1971) (5(161)): 169–206, Bibcode 1971RuMaS..26..125K, doi:10.1070/RM1971v026n05ABEH003830, MR384434, Zbl 0222.01015, http://mi.mathnet.ru/eng/umn/v26/i5/p169 

References

• Egoroff, D. Th. (1911), "Sur les suites des fonctions mesurables" (in French), Comptes rendus hebdomadaires des séances de l'Académie des sciences 152: 244–246, JFM 42.0423.01, http://gallica.bnf.fr/ark:/12148/bpt6k3105c.image.f244 , available at Gallica.
• Severini, C. (1910), "Sulle successioni di funzioni ortogonali (On the sequences of orthogonal functions)" (in Italian), Atti dell'Accademia Gioenia, serie 5^a, 3 (5): Memoria XIII, 1–7, JFM 41.0475.04 .

External links

• Dmitri Egorov at the Mathematics Genealogy Project.
• O'Connor, John J.; Robertson, Edmund F., "Dmitri Egorov", MacTutor History of Mathematics archive, University of St Andrews, http://www-history.mcs.st-andrews.ac.uk/Biographies/Egorov.html .

Persondata
Name	Egorov, Dimitri
Alternative names
Short description
Date of birth	December 22, 1869
Place of birth	Moscow, Russia
Date of death	September 10, 1931
Place of death	Kazan, USSR