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Jonas Kubilius

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Jonas Kubilius
Jonas Kubilius
Born(1921-07-27)27 July 1921
Jurbarkas District Municipality,Lithuania
Died30 October 2011(2011-10-30)(aged 90)
Vilnius,Lithuania
Alma materVilnius University
Leningrad University
Steklov Institute
Known forProbabilistic number theory
AwardsOrder of the Lithuanian Grand Duke Gediminas
Scientific career
FieldsMathematics
InstitutionsVilnius University
Lithuanian Academy of Sciences
Doctoral advisorYuri Linnik

Jonas Kubilius(27 July 1921 – 30 October 2011) was a Lithuanianmathematicianwho worked inprobability theoryandnumber theory.He wasrectorofVilnius Universityfor 32 years, and served one term in theLithuanian parliament.[1][2]

Life and education[edit]

Kubilius was born in Fermos village, Eržvilkas county,Jurbarkas District Municipality,Lithuaniaon 27 July 1921. He graduated from Raseiniai high school in 1940 and enteredVilnius University,from which he graduatedsumma cum laudein 1946 after taking off a year to teach mathematics in middle school.[3]

Kubilius received theCandidate of Sciencesdegree in 1951 fromLeningrad University.[4]His thesis, written underYuri Linnik,was titledGeometry of Prime Numbers.[3][5]He received theDoctor of Sciencesdegree (habilitation) in 1957 from theSteklov Institute of MathematicsinMoscow.[4][5]

Career[edit]

Kubilius had simultaneous careers atVilnius Universityand at theLithuanian Academy of Sciences.He continued working at the university after receiving his bachelor's degree in 1946, and worked as a lecturer and assistant professor after receiving hisCandidatedegree in 1951. In 1958 he was promoted to professor and was electedrectorof the university. He retired from the rector's position in 1991 after serving almost 33 years, and remained a professor in the university.[3]

During theKhrushchev Thawin the middle 1950s there were attempts to make the university "Lithuanian" by encouraging the use of theLithuanian languagein place ofRussianand to revive the Department of Lithuanian Literature. This work was started by the rectorJuozas Bulavas,butStalinistsobjected and Bulavas was dismissed.[6]: 50–51 Kubilius replaced him as rector and was more successful in resisting pressure toRussifythe University: he returned Lithuanian language and culture to the forefront of the University.[7]: 190 Česlovas Masaitis attributes Kubilius's success to "his ability to manipulate within the complex bureaucratic system of the Soviet Union and mainly because of his international recognition due to his scientific achievements."[3]Kubilius also encouraged the faculty to write research papers in Lithuanian, English, German, and French, as well as in Russian, and he himself wrote several textbooks in Lithuanian.[3]Jonas Kubilius known by pseudonym Bernotas was also involved inLithuanian partisanmovement.[8]According to some sources Lithuanian partisans suggested him to continue studies and stay alive to work for Lithuania in the future.

In 1952 Kubilius became an employee of theLithuanian Academy of Sciencesin the Physics, Mathematics and Astronomy Sector. He initially promoted the development ofprobability theoryin Lithuania, and later the development ofdifferential equationsandmathematical logic.In 1956 the Physical and Technical Institute was reorganized and Kubilius became head of the new Mathematical Sector.[5]When he became rector of Vilnius University in 1958 he gave up his duties as head and was succeeded byVytautas Statulevičiusin 1960.[9]In 1962 he was elected a member of the Academy.[3]He held a position as Principal Scientific Worker at the Institute of Mathematics and Informatics,[10]which split from the Lithuanian Academy of Sciences and is now an independent state scientific institute.[11]

Kubilius's scientific work was in the areas ofnumber theoryandprobability theory.[3]TheTurán–Kubilius inequality[12]: 316 and theKubilius model[13]: 104 inprobabilistic number theoryare named after him. Eugenijus Manstavičius and Fritz Schweiger wrote about Kubilius's work in 1992, "the most impressive work has been done on the statistical theory of arithmetic functions which almost created a new research area called Probabilistic Number Theory. A monograph devoted to this topic was translated into English in 1964 and became very influential."[14](The monograph isProbabilistic Methods in the Theory of Numbers.)

Kubilius organized the firstmathematical olympiadin Lithuania in 1951,[15]and he wrote books of problems for students to use in preparing for the olympiads.[3]He was a past president of theLithuanian Mathematical Society.[3]

In addition to his scientific and administrative work, Kubilius was a member of theSeimas(Lithuanian parliament) from 1992 to 1996.[16]

Honors and awards[edit]

Kubilius on a 2021 stamp of Lithuania

Selected publications[edit]

  • Kubilius, Jonas (1964).Probabilistic Methods in the Theory of Numbers.Translations of Mathematical Monographs. Vol. 11. Providence, RI: American Mathematical Society.ISBN978-0-8218-1561-8.

References[edit]

  1. ^Jonušienė, Danutė (2011-10-30)."Ilgaamžiškumo lygtį išsprendęs J.Kubilius per gyvenimą ėjo nedejuodamas dėl smulkmenų"(in Lithuanian).Lietuvos rytas.Archived fromthe originalon 31 October 2011.Retrieved1 November2011.
  2. ^(fromELTAandBaltic News Service) (2011-10-30)."Mirė buvęs VU rektorius prof.J.Kubilius"(in Lithuanian).DELFI.Retrieved1 November2011.
  3. ^abcdefghiMasaitis, Česlovas (1992)."An Ordinary Birthday of an Extraordinary Person".Lituanus.32(2): 31–40.ISSN0024-5089.Archived fromthe originalon 2019-08-04.Retrieved2009-04-18.
  4. ^ab"Prof. Dr. Habil. Jonas KUBILIUS: Significant dates".Institute of Mathematics and Informatics. 2007-02-12.Retrieved2009-04-16.
  5. ^abcRutkauskas, Stasys (1996)."Forty Years History of the Institute of Mathematics and Informatics"(PDF).Annual Report.Institute of Mathematics and Informatics: 5–10.Retrieved2009-04-16.
  6. ^"Vilnius University 1579–2004"(PDF).Vilnius University.Retrieved2009-04-17.
  7. ^Clark, Terry D. (2005). "Lithuania". In Frucht, Richard (ed.).Eastern Europe: an introduction to the people, lands, and culture.Vol. 1. ABC-CLIO. pp. 165–201.ISBN978-1-57607-800-6.Retrieved2009-04-17.
  8. ^"Didžiosios Kovos partizanų apygarda"(in Lithuanian).Retrieved18 April2018.
  9. ^"History of the Institute of Mathematics and Informatics: dates, facts, people, and comments; Institute of Physics and Mathematics (IPhM) before the first reorganization (1956-1966)".Institute of Mathematics and Informatics.Retrieved2009-04-16.
  10. ^"Prof. Dr. Habil. Jonas KUBILIUS".Institute of Mathematics and Informatics. 2007-02-12.Retrieved2009-04-16.
  11. ^"Institute of Mathematics and Informatics"(PPT).Institute of Mathematics and Informatics. April 3, 2005.Retrieved2009-04-16.
  12. ^Tenenbaum, Gérald (1995).Introduction to Analytic and Probabilistic Number Theory.Cambridge studies in advanced mathematics. Vol. 46. Cambridge University Press.ISBN0-521-41261-7.
  13. ^Ford, Kevin (2007). "From Kolmogorov's theorem on empirical distribution to number theory". In Charpentier, Éric; Lesne, Annick; Nikolʹskiĭ, Nikolaĭ Kapitonovich (eds.).Kolmogorov's Heritage in Mathematics.Springer. pp. 97–108.ISBN978-3-540-36349-1.Retrieved2009-04-17.
  14. ^Manstavičius, Eugenijus; Schweiger, Fritz (1992). "Preface". In Manstavičius, Eugenijus; Schweiger, Fritz (eds.).Analytic and probabilistic methods in number theory.New Trends in Probability and Statistics. Vol. 2. Utrecht: VSP. p. xi.ISBN978-90-6764-094-7.Retrieved2009-04-17.
  15. ^Stankus, Eugenijus; Romualdas Kašuba (2006-04-19)."Some Additional Mathematical Activities in Mathematical Education in Lithuania"(PDF).Archived fromthe original(PDF)on 2009-10-13.Retrieved2009-04-17.
  16. ^"Lieutvos Respubliko Seimas - Jonas KUBILIUS, Member of the Seimas 1992–1996".Seimas of the Republic of Lithuania. August 18, 2006.Retrieved2009-04-16.
  17. ^"Order of the Lithuanian Grand Duke Gediminas".Administration of the Office of the President of Lithuania. Archived fromthe originalon 2013-02-27.Retrieved2009-04-16.

Further reading[edit]

External links[edit]

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