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Biography
KYRILLE ATANASOFF POPOFF
(03.05.1880 – 01.05.1966)
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Born in Shumen.
Education:
K. Popoff studied mathematics and physics at the High School in Sofia (1898 – 1902).
He specialized astronomy in Munich, Heidelberg, Nice (1906 – 1909) and Paris (1909 – 1910). In his PhD thesis he investigated orbit of Hekube at the University of Paris (1912).
Research:
Dr Kyrille Popoff used mathematical methods to solve physical problems in the aria of enternal and external balistics, magnetism of the earth, and thermodynamics of non-reversible proceses.
Professional experience:
In the chair of astronomy K. Popoff was Assistant Professor (1904 – 1914).
Dr K. Popoff headed the chair of Differential and Integral Calculus (1914 – 1952). He was Associate Professor (1914), Extraordinary Professor (1920), Professor (1922).
He was one of the editors of “Revue mathematique de l'Union interbalkanique”, printed in Athens since 1936.
Teaching activities:
In the Sofia University K. Popoff lectured "Differential and Integral Calculus", "Differential Geometry", "Calculus of Probability", "Theoretical Astronomy" (1926-1927; 1927-1928), "Mathematical Theory of Insurance" (1938 – 1939; 1948 – 1949; 1949 – 1950).
Awards:
Academy of Sciences in France awarded him with premium “Montion” for his results in balistics (1926) and prise "Anry de Parvil" (1957).
Publications:
K. Popoff, Sur le mouvement de 108 Hecube, Paris (1912)
K. Popoff, Sur une propriete des orbites, Astronomische Nasrichte, 211(5059) 369-370 (1920)
K. Popoff, Uber die eigenschaft der ballistischen kurve und ihre anwendung auf die integration der bewegungsgleichungen, Zeitschrift fur angewandte Mathematik und Mechanik, 1(2) 96-106 (1921)
K. Popoff, Sur l'integration des equations de la balistique dans les conditions generales de la resistance, Comptes Rendus Academie Science, Paris, 175(10) 337-340 (1922)
K. Popoff, Sur une propriete geometrique des trajectoires des bolides dans l'atmosphere terrestre, Probleme des Astronomie (1924) 169-175
K. Popoff, Les methodes d'integration de Poincare et le probleme generale de la ballistique exterieure, Paris (1925)
K. Popoff, Sur la convergence des series de la mecanique celeste, Comptes Rendus, Paris, 183(9) 472-474 (1926)
K. Popoff, Sur le probleme des trois corps, Atti. Congress International Mathematicians, Bologna (1928) p. 49
K. Popoff, Sur le probleme des trois corps, Mathematische Annalen, 101, 570-590 (1929)
K. Popoff, Bemerkungen zu der arbeit von G. Maneff: Die gravitation und das prinzip von wirkung und gegenwirkung, Zeitschrift fur Physik, 32, 403-405 (1929)
K. Popoff, Die Hauptprobleme der ausseren Ballistik im Lichte der modernen Mathematik, Leipzig (1932)
K. Popoff, Die erdmagnetischer declination in Bulgarien, Zeitschrift fur Geophysik, 8(3-4) s. 146 (1932)
K. Popoff, Sur les solutions periodique et asymptotique des trois corps, Bulletin Astronomique, Paris, 9, p. 177 (1934)
K. Popoff, Une application du potentiel de Neumann en astronomie, Act. Congr. Interbalk. Math., Athenes (1934) p. 131
K. Popoff, Sur les solutions periodique et asymptotique des trois corps, C.r. II congr. Math. Pays slav., Praha (1935) p. 118
K. Popoff, Sur le mouvement du projectile, Proc. 5-th International Congres Applied Mechanics, Cambridge (1938) s. 724
References:
100 години БАН, т. 1, 1969, с. 573-578
А. Дацев, Кирил Атанасов Попов (1880-1966), Бележити български физици, изд. Народна просвета, София, 1981 с. 42-50
Д. Вачов, Кирил Атанасов Попов (1880 – 1966), Физико-математическо списание, г. 23, 1980 – 1981, кн.1, с. 65-69
Акад. Кирил Попов (1880 – 1965), По случай 90 години от рождението му, Физико-математическо списание, т. 13 (1970) кн. 3
Г. Камишева, Университетската физика в България (1889 – 1949), София, 2012, с. 30, 40, 42, 45-47, 51, 53-55, 66-67, 69, 107-110, 115, 123, 130, 137, 139-140, 152-153, 158, 166
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