To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

How to transfigure the Wikipedia

Would you like Wikipedia to always look as professional and up-to-date? We have created a browser extension. It will enhance any encyclopedic page you visit with the magic of the WIKI 2 technology.

Try it — you can delete it anytime.

Install in 5 seconds
4,5
Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
Live Statistics
English Articles
Improved in 24 Hours
Added in 24 Hours
Languages
Recent
Show all languages
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.
Great Wikipedia has got greater.
.
Leo
Newton
Brights
Milds

Johan Frederik Steffensen

From Wikipedia, the free encyclopedia

Johan Frederik Steffensen (28 February 1873, in Copenhagen – 20 December 1961) was a Danish mathematician, statistician, and actuary who did research in the fields of calculus of finite differences and interpolation.[1] He was professor of actuarial science at the University of Copenhagen from 1923 to 1943. Steffensen's inequality and Steffensen's method (an iterative numerical method) are named after him. He was an Invited Speaker at the 1912 International Congress of Mathematicians (ICM) in Cambridge, England and at the 1924 ICM in Toronto.[2]

... His more important works included the theory of statistics (1923), interpolation (1925), insurance mathematics (1934) and the calculation of interest (1936). ... He was President of the Danish Actuarial Society in 1922-24 and 1930-33, and of the Danish Mathematical Society in 1930-36 ...[3]

YouTube Encyclopedic

  • 1/1
    Views:
    5 531
  • Størst Af Alt | Br15hter Kortfilm

Transcription

Publications

  • Factorial moments and discontinuous frequency-functions. Uppsala: Almqvist & Wiksells Boktryckeri-A.B. 1923; 89 pages{{cite book}}: CS1 maint: postscript (link)
  • Interpolation. London: Williams & Wilkins. 1927.[4]

Obituary

  • Nordlund N. E. (1962). "Johan Frederik Steffensen in memoriam". Nordisk Matematisk Tidsskrift. 10: 105–107.

References

  1. ^ "Review of (1) Interpolation Formulas, with one and more variables. Pp. 26; (2) Factorial Moments and Discontinuous Frequency Functions. Pp. 17. By J. F. Steffensen, Ph.D., [Reprinted from Skandinavisk Aktuarietidskrift. Upsala. 1923.]". Journal of the Institute of Actuaries. 54 (3): 301–302. 2016. doi:10.1017/S0020268100030341. ISSN 0020-2681.
  2. ^ "Steffensen, J. F." ICM Plenary and Invited Speakers.
  3. ^ Ogborn, M. E (September 1962). "Obituary. Johan Frederik Steffensen". Journal of the Institute of Actuaries. 88 (2): 251–252. doi:10.1017/S0020268100015067.
  4. ^ Longley, W. R. (1928). "Review of Interpolation by J. F. Steffensen and Numerische Infinitesmalrechnung by Martin Lindow". Bull. Amer. Math. Soc. 34 (5): 674–675. doi:10.1090/S0002-9904-1928-04674-8.

External links


Flag of Denmark
Scientist icon
Stub icon

This article about a Danish scientist is a stub. You can help Wikipedia by expanding it.

Stub icon

This article about a European mathematician is a stub. You can help Wikipedia by expanding it.

This page was last edited on 3 August 2022, at 14:52
Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.
Contact WIKI 2
Introduction
Terms of Service
Privacy Policy