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Viggo Brun
Born 13 October 1885
Lier, Norway
Died 15 August 1978 (1978-08-16 ) (aged 92 )
Drøbak, Norway
Citizenship Norway Known for Brun's Theorem, Brun Sieve Scientific career Fields Number Theory
Viggo Brun (13 October 1885 – 15 August 1978) was a Norwegian professor, mathematician and number theorist .
[1]
Contributions
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In 1915, he introduced a new method, based on Legendre 's version of the sieve of Eratosthenes , now known as the Brun sieve , which addresses additive problems such as Goldbach's conjecture and the twin prime conjecture . He used it to prove that there exist infinitely many integers n such that n and n +2 have at most nine prime factors , and that all large even integers are the sum of two numbers with at most nine prime factors.[2]
He also showed that the sum of the reciprocals of twin primes converges to a finite value, now called Brun's constant : by contrast, the sum of the reciprocals of all primes is divergent . He developed a multi-dimensional continued fraction algorithm in 1919–1920 and applied this to problems in musical theory . He also served as praeses of the Royal Norwegian Society of Sciences and Letters in 1946.[3]
Biography
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Brun was born at Lier in Buskerud , Norway. He studied at the University of Oslo and began research at the University of Göttingen in 1910. In 1923, Brun became a professor at the
Viggo Brun (published in 1911)
Technical University in Trondheim and in 1946 a professor at the University of Oslo .[4]
He retired in 1955 at the age of 70 and died in 1978 (at 92 years-old) at Drøbak in Akershus , Norway.[5]
See also
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Fotnoter
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References
[ edit ]
^ "Viggo Brun" . numbertheory.org. 18 June 2003. Retrieved January 1, 2017 .
^ J J O'Connor; E F Robertson. "Viggo Brun" . School of Mathematics and Statistics, University of St Andrews, Scotland. Archived from the original on 2017-01-16. Retrieved January 1, 2017 .
^ Bratberg, Terje (1996). "Vitenskapsselskapet". In Arntzen, Jon Gunnar (ed.). Trondheim byleksikon . Oslo: Kunnskapsforlaget. pp. 599–600. ISBN 82-573-0642-8 .
^ "Viggo Brun" . Store norske leksikon. Retrieved January 1, 2017 .
^ Bent Birkeland. "Viggo Brun" . Norsk biografisk leksikon. Retrieved January 1, 2017 .
Other sources
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R e t r i e v e d f r o m " https://en.wikipedia.org/w/index.php?title=Viggo_Brun&oldid=1214995577 "
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a d d i t i o n a l t e r m s m a y a p p l y . B y u s i n g t h i s s i t e , y o u a g r e e t o t h e T e r m s o f U s e a n d P r i v a c y P o l i c y . W i k i p e d i a ® i s a r e g i s t e r e d t r a d e m a r k o f t h e W i k i m e d i a F o u n d a t i o n , I n c . , a n o n - p r o f i t o r g a n i z a t i o n .
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