Ivan M. Niven Biography
Ivan Morton Niven (October 25, 1915:– May 9, 1999) was a Canadian-American number theorist best remembered for his work on Waring's problem. He worked for many years as a professor at the University of Oregon, and was president of the Mathematical *ociation of America. He wrote several books on mathematics.
Life
Niven was born in Vancouver. He did his undergraduate studies at the University of British Columbia and was awarded his doctorate in 1938 from the University of Chicago. He was a member of the University of Oregon faculty from 1947 to his retirement in 1981. He was president of the Mathematical *ociation of America (MAA) from 1983 to 1984.
He died in 1999 in Eugene, Oregon.
Research
Niven completed the solution of most of Waring's problem in 1944. This problem, based on a 1770 conjecture by Edward Waring, consists of finding the smallest number g ( n ) {\displaystyle g(n)} such that every positive integer is the sum of at most g ( n ) {\displaystyle g(n)} n {\displaystyle n} -th powers of positive integers. David Hilbert had proved the existence of such a g ( n ) {\displaystyle g(n)} in 1909; Niven's work established the value of g ( n ) {\displaystyle g(n)} for all but finitely many values of n {\displaystyle n} .
Niven gave an elementary proof that π {\displaystyle \pi } is irrational in 1947.
Niven numbers, Niven's constant, and Niven's theorem are named for Niven.
He has an Erdős number of 1 because he coaut*d a paper with Paul Erdős.
Recognition
Niven received the University of Oregon's Charles E. Johnson Award in 1981. He received the MAA Distinguished Service Award in 1989.
He won a Lester R. Ford Award in 1970. In 2000, the a* 12513 Niven, discovered in 1998, was named after him.
Books
- Irrational Numbers. . The Mathematical *ociation of America. 1956. ISBN:0-88385-011-7.
- Niven, Ivan; Zuckerman, Herbert S.; Montgomery, Hugh L. (1991) . An Introduction to the Theory of Numbers. New York: John Wiley & Sons. ISBN:978-81-265-1811-1.
- Calculus. Van Nostrand Reinhold Company. 1966. ISBN:978-0-442-06032-9.
- Numbers: Rational and Irrational. Washington DC: The Mathematical *ociation of America. 2011 . doi:10.5948/upo9780883859193. ISBN:978-0-88385-919-3.
- Diophantine Approximations. Mineola, N.Y: Dover Publications. 1 January 2008 . ISBN:978-0-486-46267-7.
- Mathematics of Choice: How to Count without Counting. Washington, DC: Mathematical *ociation of America. 1965. ISBN:978-0-88385-615-4.
- Maxima and Minima Without Calculus. Washington, D.C.: Cambridge University Press. 1981. ISBN:978-0-88385-306-1.
External links
- Donald Albers and G. L. Alexanderson. "A conversation with Ivan Niven", College Mathematics Journal, 22, 1991, pp.:371–402.
See also
- Proof that π is irrational
References
