Dmitri Egorov

Dmitri Fyodorovich Egorov (Russian: Дми́трий Фёдорович Его́ров; December 22, 1869 – September 10, 1931) was a Russian and Soviet mathematician known for significant contributions to the areas of differential geometry and mathematical analysis. He was President of the Moscow Mathematical Society (1923–1930).

Dmitri Egorov
Born(1869-12-22)December 22, 1869
Moscow, Russian Empire
DiedSeptember 10, 1931(1931-09-10) (aged 61)
Kazan, Soviet Union
NationalityRussian
CitizenshipRussian Empire
Soviet Union
EducationDoctor of Science (1901)
Corresponding Member of the Russian Academy of Sciences
Alma materImperial Moscow University (1891)
Known forWorks on differential geometry and mathematical analysis, Egorov's Theorem, president of the Moscow Mathematical Society
Scientific career
FieldsMathematics
InstitutionsImperial Moscow University
Moscow State University
ThesisConcerning One Class of Orthogonal Systems (1901)
Doctoral advisorNikolai Bugaev
Doctoral studentsPavel Alexandrov
Nikolai Luzin
Ivan Petrovsky
Ivan Privalov
Adolf Yushkevich
Dmitrii Menshov

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. He also edited the journal Matematicheskii Sbornik of the Moscow Mathematical Society.[1] However, because of Egorov's stance against the repression of the Russian Orthodox 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. He was buried in Arskoe Cemetery in Kazan.[2]

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.[3]

Works
  • Egoroff, D. Th. (1911), "Sur les suites des fonctions mesurables", Comptes rendus hebdomadaires des séances de l'Académie des sciences (in French), 152: 244–246, JFM 42.0423.01, available at Gallica.

Notes
  1. Shields, Allen (1989), "Years Ago: Egorov and Luzin, Part 2", Mathematical Intelligencer, 11 (2): 5–8, doi:10.1007/BF03023816. Reprinted in Sinai, Yakov G., ed. (2003), Russian Mathematicians in the 20th Century, World Scientific, pp. 67–70, ISBN 9789812383853.
  2. O'Connor, J. J., and Robertson, E. F., "Dimitri Fedorovich Egorov," MacTutor. January 2012. FRetrieved 11 August 2020.
  3. 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).

Further reading
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