Boris Demidovich
Encyclopedia
Boris Pavlovich Demidovich (Novogrudok, March 2, 1906 – Moscow
, April 23, 1977) was a Belorussian
mathematician
.
s.
His father, Pavel (1871 – 1931), was able to get higher education, graduating in 1897 at Vilensky institute; Pavel Demidovich was a teacher throughout his life, first teaching in different towns in the Minsk and Vilnius
provinces, and then in Minsk
; he was very attached to his family, and to Belorussian beliefs and rituals. He also recorded some anonymous literary works of the Belorussian tradition. In 1908 Pavel Demidovich was nominated member of the Imperial Officer of the Company Enthusiasts science, Anthropology at Moscow University.
Demidovich's mother, Olympia Platonovna Demidovich (1876 – 1970), the daughter of a priest
, had been a teacher too before her marriage, when she chose to retire, in order to raise their children. Boris Demidovich had three sisters, Zinaida, Evgeniia, Zoya and a younger brother, Paul.
After graduating in 1923 Demidovich attended the physical-mathematical branch of the teaching faculty, that had been established in 1921, at the Belorussian State University. He obtained his degree
in 1927 and was recommended to the graduate school faculty of higher mathematics, but Demidovich did not considered that a possibility and went to work in Russia
instead.
and Bryansk
regions. After casually reading an advertisement in a local newspaper, he moved to Moscow
and in 1931, taught in a graduate school of the Research Institute of Mathematics and Mechanics at Moscow State University. At the end of this short term, he obtained the teaching chair in the Transportation and Economic Institute NKPS, and taught there at the Department of Mathematics in 1932–33. In 1933, while retaining his teaching office at T.E.I. NKPS, Demidovich was even enlisted as senior member at the Bureau of Pilot Transport construction NKPS and worked there until 1934.
At the same time, in 1932, Demidovich became a post-graduate student at the Mathematical Institute, Moscow State University, after succeeding a competition. As a postgraduate, Demidovich began to work under the guidance of Andrey Nikolaevich Kolmogorov on the theory of functions of a real variable
.
Kolmogorov saw that Demidovich was interested in the problems of differential equations, invited him to join him in studying the qualitative theory of ordinary differential equations under the direction of Vyacheslav Stepanov. Supervising his activities, Stepanov identified himself as the scientific advisor of his younger colleague.
After his graduation, in 1935, Demidovich worked for one semester at the Department of Mathematics at the Institute for the leather industry. And, since February 1936, at the invitation of LA Tumarkin, he served as assistant chair of mathematical analysis of Mechanics and Mathematics Faculty of Moscow State University. Until his death he remained a permanent staff member. In 1935 at the Moscow University, Demidovich discussed his PhD thesis, "On the existence of the integral invariant on a system of periodic orbits" and the following year, he was awarded the degree of Ph.D.
In 1938, Demidovich was granted the rank of assistant professor of mathematical analysis at Mehmata MSU. In 1963, VAK awarded him the degree of Doctor of physical and mathematical sciences, and in 1965, Demidovich was granted the rank of professor in the department of mathematical analysis at Mehmata MSU. In 1968, the Presidium of the Supreme Council of Russia awarded Demidovich the honorary title "Meritorious Scientist of the RSFSR".
Demidovich suddenly died on 23rd of April in 1977 of acute cardiovascular insufficiency.
Along with scientific and educational activities in the MSU, BP Demidovich concurrently taught at several leading Universities in Moscow (MVTU, NE Bauman, the Military Engineering Academy, F. E. Dzerzhinsky, etc.). His experience as a teacher is reflected in the books he wrote on mathematical analysis, that were translated into many foreign languages.
Demidovich was often invited in Organizing Committees of scientific conferences and he actively cooperated with the editorial staff of various mathematical journal ("Differential Equations", RJ "Mathematics"), as well as the mathematical formulation of "BSE".
Moscow
Moscow is the capital, the most populous city, and the most populous federal subject of Russia. The city is a major political, economic, cultural, scientific, religious, financial, educational, and transportation centre of Russia and the continent...
, April 23, 1977) was a Belorussian
Belarus
Belarus , officially the Republic of Belarus, is a landlocked country in Eastern Europe, bordered clockwise by Russia to the northeast, Ukraine to the south, Poland to the west, and Lithuania and Latvia to the northwest. Its capital is Minsk; other major cities include Brest, Grodno , Gomel ,...
mathematician
Mathematician
A mathematician is a person whose primary area of study is the field of mathematics. Mathematicians are concerned with quantity, structure, space, and change....
.
Family and early life
Demidovich was born in a family of teacherTeacher
A teacher or schoolteacher is a person who provides education for pupils and students . The role of teacher is often formal and ongoing, carried out at a school or other place of formal education. In many countries, a person who wishes to become a teacher must first obtain specified professional...
s.
His father, Pavel (1871 – 1931), was able to get higher education, graduating in 1897 at Vilensky institute; Pavel Demidovich was a teacher throughout his life, first teaching in different towns in the Minsk and Vilnius
Vilnius County
Vilnius County is the largest of the 10 counties of Lithuania, located in the east of the country around the city Vilnius. On 1 July 2010, the county administration was abolished, and since that date, Vilnius County remains as the territorial and statistical unit.-History:Until the Partitions of...
provinces, and then in Minsk
Minsk
- Ecological situation :The ecological situation is monitored by Republican Center of Radioactive and Environmental Control .During 2003–2008 the overall weight of contaminants increased from 186,000 to 247,400 tons. The change of gas as industrial fuel to mazut for financial reasons has worsened...
; he was very attached to his family, and to Belorussian beliefs and rituals. He also recorded some anonymous literary works of the Belorussian tradition. In 1908 Pavel Demidovich was nominated member of the Imperial Officer of the Company Enthusiasts science, Anthropology at Moscow University.
Demidovich's mother, Olympia Platonovna Demidovich (1876 – 1970), the daughter of a priest
Priest
A priest is a person authorized to perform the sacred rites of a religion, especially as a mediatory agent between humans and deities. They also have the authority or power to administer religious rites; in particular, rites of sacrifice to, and propitiation of, a deity or deities...
, had been a teacher too before her marriage, when she chose to retire, in order to raise their children. Boris Demidovich had three sisters, Zinaida, Evgeniia, Zoya and a younger brother, Paul.
After graduating in 1923 Demidovich attended the physical-mathematical branch of the teaching faculty, that had been established in 1921, at the Belorussian State University. He obtained his degree
Academic degree
An academic degree is a position and title within a college or university that is usually awarded in recognition of the recipient having either satisfactorily completed a prescribed course of study or having conducted a scholarly endeavour deemed worthy of his or her admission to the degree...
in 1927 and was recommended to the graduate school faculty of higher mathematics, but Demidovich did not considered that a possibility and went to work in Russia
Russia
Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...
instead.
Professional life
For four years, Demidovich served as professor of mathematics in secondary schools throughout the SmolenskSmolensk Oblast
Smolensk Oblast is a federal subject of Russia . Its area is . Population: -Geography:The administrative center of Smolensk Oblast is the city of Smolensk. Other ancient towns include Vyazma and Dorogobuzh....
and Bryansk
Bryansk Oblast
Bryansk Oblast is a federal subject of Russia . Its administrative center is the city of Bryansk. Population: 1,278,087 .-History:...
regions. After casually reading an advertisement in a local newspaper, he moved to Moscow
Moscow
Moscow is the capital, the most populous city, and the most populous federal subject of Russia. The city is a major political, economic, cultural, scientific, religious, financial, educational, and transportation centre of Russia and the continent...
and in 1931, taught in a graduate school of the Research Institute of Mathematics and Mechanics at Moscow State University. At the end of this short term, he obtained the teaching chair in the Transportation and Economic Institute NKPS, and taught there at the Department of Mathematics in 1932–33. In 1933, while retaining his teaching office at T.E.I. NKPS, Demidovich was even enlisted as senior member at the Bureau of Pilot Transport construction NKPS and worked there until 1934.
At the same time, in 1932, Demidovich became a post-graduate student at the Mathematical Institute, Moscow State University, after succeeding a competition. As a postgraduate, Demidovich began to work under the guidance of Andrey Nikolaevich Kolmogorov on the theory of functions of a real variable
Function of a real variable
In mathematics, a function of a real variable is a mathematical function whose domain is the real line. More loosely, a function of a real variable is sometimes taken to mean any function whose domain is a subset of the real line....
.
Kolmogorov saw that Demidovich was interested in the problems of differential equations, invited him to join him in studying the qualitative theory of ordinary differential equations under the direction of Vyacheslav Stepanov. Supervising his activities, Stepanov identified himself as the scientific advisor of his younger colleague.
After his graduation, in 1935, Demidovich worked for one semester at the Department of Mathematics at the Institute for the leather industry. And, since February 1936, at the invitation of LA Tumarkin, he served as assistant chair of mathematical analysis of Mechanics and Mathematics Faculty of Moscow State University. Until his death he remained a permanent staff member. In 1935 at the Moscow University, Demidovich discussed his PhD thesis, "On the existence of the integral invariant on a system of periodic orbits" and the following year, he was awarded the degree of Ph.D.
In 1938, Demidovich was granted the rank of assistant professor of mathematical analysis at Mehmata MSU. In 1963, VAK awarded him the degree of Doctor of physical and mathematical sciences, and in 1965, Demidovich was granted the rank of professor in the department of mathematical analysis at Mehmata MSU. In 1968, the Presidium of the Supreme Council of Russia awarded Demidovich the honorary title "Meritorious Scientist of the RSFSR".
Demidovich suddenly died on 23rd of April in 1977 of acute cardiovascular insufficiency.
Scientific activity
Demidovich mainly worked in five areas:- dynamical systems with integral invariants;
- periodic and quasi-periodic solutions of ordinary differential equations;
- correct and it is correct (on Demidovich) differential system;
- limited solutions of ordinary differential equations;
- sustainability of ordinary differential equations, in particular, the orbital stability of dynamical systems.
Along with scientific and educational activities in the MSU, BP Demidovich concurrently taught at several leading Universities in Moscow (MVTU, NE Bauman, the Military Engineering Academy, F. E. Dzerzhinsky, etc.). His experience as a teacher is reflected in the books he wrote on mathematical analysis, that were translated into many foreign languages.
Demidovich was often invited in Organizing Committees of scientific conferences and he actively cooperated with the editorial staff of various mathematical journal ("Differential Equations", RJ "Mathematics"), as well as the mathematical formulation of "BSE".