# Aleksandr Khinchin

Aleksandr Khinchin | |
---|---|

Born | Kondrovo, Russian Empire (present-day Kaluga Oblast, Russia) |
July 19, 1894

Died | November 18, 1959 Moscow, Russian SFSR (present-day Russia) |
(aged 65)

Nationality | Russian, Soviet |

Fields | Mathematics |

Institutions | Moscow State University |

Alma mater | Moscow State University |

Doctoral advisor | Nikolai Luzin |

Doctoral students | Alexander Buchstab Alexander Gelfond Dmitry Raikov |

**Aleksandr Yakovlevich Khinchin** (Russian: Алекса́ндр Я́ковлевич Хи́нчин, French: *Alexandre Khintchine*; July 19, 1894 – November 18, 1959) was a Soviet mathematician and one of the most significant people in the Soviet school of probability theory.

## Life and career

He was born in the village of Kondrovo, Kaluga Governorate, Russian Empire. While studying at Moscow State University, he became one of the first followers of the famous Luzin school. Khinchin graduated from the university in 1916 and six years later he became a full professor there, retaining that position until his death.

Khinchin's early works focused on real analysis. Later he applied methods from the metric theory of functions to problems in probability theory and number theory. He became one of the founders of modern probability theory, discovering the law of the iterated logarithm in 1924, achieving important results in the field of limit theorems, giving a definition of a stationary process and laying a foundation for the theory of such processes.

Khinchin made significant contributions to the metric theory of Diophantine approximations and established an important result for simple real continued fractions, discovering a property of such numbers that leads to what is now known as Khinchin's constant. He also published several important works on statistical physics, where he used the methods of probability theory, and on information theory, queuing theory and mathematical analysis.

In 1939 Khinchin was elected as a Correspondent Member of the Academy of Sciences of the USSR. He was awarded the Stalin Prize (1941), the Order of Lenin, three other orders, and medals.

## See also

- Pollaczek–Khinchine formula
- Wiener–Khinchin theorem
- Khinchin inequality
- Equidistribution theorem
- Khinchin's constant
- Khinchin–Lévy constant
- Khinchin's theorem on Diophantine approximations
- Law of the iterated logarithm
- Palm-Khintchine Theorem
- Lévy–Khintchin formula of characteristic function of Lévy process

## Bibliography

*Sur la Loi des Grandes Nombres*, in*Comptes Rendus de l'Academie des Sciences*, Paris, 1929*Asymptotische Gesetze der Wahrscheinlichkeitsrechnung*, Berlin: Julius Springer, 1933^{[1]}*Continued Fractions*, Mineola, N.Y. : Dover Publications, 1997, ISBN 0-486-69630-8 (first published in Moscow, 1935)*Three Pearls of Number Theory*, Mineola, NY : Dover Publications, 1998, ISBN 0-486-40026-3 (first published in Moscow and Leningrad, 1947)^{[2]}*Mathematical Foundations of Quantum Statistics*, Mineola, N.Y. : Dover Publications, 1998, ISBN 0-486-40025-5 (first published in Moscow and Leningrad, 1951; trans. in 1960 by Irwin Shapiro)^{[3]}

## References

- ↑ Rietz, H. L. (1934). "Review:
*Asymptotische Gesetze der Wahrscheinlichkeitsrechnung*by A. Khintchine" (PDF).*Bull. Amer. Math*.**40**(7): 518–519. doi:10.1090/s0002-9904-1934-05880-4.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles> - ↑ Brauer, Alfred (1955). "Review:
*Three Pearls of Number Theory*by A. Y. Khinchin" (PDF).*Bull. Amer. Math. Soc*.**61**(4): 351–353. doi:10.1090/S0002-9904-1955-09940-3.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles> - ↑ Mackey, George W. (1962). "Review:
*Mathematical Foundations of Quantum Statistics*by Y. A. Khinchin, trans. by Irwin Shapiro" (PDF).*Bull. Amer. Math. Soc*.**68**(3): 169–172. doi:10.1090/s0002-9904-1962-10731-9.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>

## External links

- Aleksandr Khinchin at the Mathematics Genealogy Project
- O'Connor, John J.; Robertson, Edmund F., "Aleksandr Khinchin",
*MacTutor History of Mathematics archive*, University of St Andrews<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>. - List of books by Khinchin provided by National Library of Australia

- Articles containing Russian-language text
- Articles containing French-language text
- 20th-century mathematicians
- Russian mathematicians
- Soviet mathematicians
- Number theorists
- Probability theorists
- Queueing theorists
- Stalin Prize winners
- Moscow State University alumni
- Moscow State University faculty
- Corresponding Members of the USSR Academy of Sciences
- 1894 births
- 1959 deaths