... 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]
Interpolation. London: Williams & Wilkins. 1927.[4]
Obituary
Nordlund N. E. (1962). "Johan Frederik Steffensen in memoriam". Nordisk Matematisk Tidsskrift. 10: 105–107.
References
^"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.
^"Steffensen, J. F." ICM Plenary and Invited Speakers.
^Ogborn, M. E (September 1962). "Obituary. Johan Frederik Steffensen". Journal of the Institute of Actuaries. 88 (2): 251–252. doi:10.1017/S0020268100015067.
^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
Johan Frederik Steffensen papirer (Danish)
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johan, frederik, steffensen, february, 1873, copenhagen, december, 1961, danish, mathematician, statistician, actuary, research, fields, calculus, finite, differences, interpolation, professor, actuarial, science, university, copenhagen, from, 1923, 1943, stef. 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 Contents 1 Publications 2 Obituary 3 References 4 External linksPublications EditFactorial moments and discontinuous frequency functions Uppsala Almqvist amp Wiksells Boktryckeri A B 1923 89 pages a href Template Cite book html title Template Cite book cite book a CS1 maint postscript link Interpolation London Williams amp Wilkins 1927 4 Obituary EditNordlund N E 1962 Johan Frederik Steffensen in memoriam Nordisk Matematisk Tidsskrift 10 105 107 References Edit 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 Steffensen J F ICM Plenary and Invited Speakers Ogborn M E September 1962 Obituary Johan Frederik Steffensen Journal of the Institute of Actuaries 88 2 251 252 doi 10 1017 S0020268100015067 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 EditJohan Frederik Steffensen papirer Danish This article about a Danish scientist is a stub You can help Wikipedia by expanding it vte This article about a European mathematician is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Johan Frederik Steffensen amp oldid 1102135948, wikipedia, wiki, book, books, library,
