Niels Erik Nørlund Explained

Niels Erik Nørlund
Birth Date:	26 October 1885
Birth Place:	Slagelse, Denmark
Death Date:	4 July 1981
Death Place:	Copenhagen, Denmark
Field:	Mathematics

Niels Erik Nørlund ^[1] (26 October 1885, in Slagelse  - 4 July 1981, in Copenhagen) was a Danish mathematician.^[2]

His book Vorlesungen über Differenzenrechnung (1924, reprinted 1954) was the first book on complex function solutions of difference equations. His doctoral students include Georg Rasch.

The Norlund Alps and Norlund Land in Greenland were named after him.^[3]

He was also the brother of Margrethe Nørlund Bohr and brother-in-law of Nobel Prize winning physicist Niels Bohr.

Selected works

• Book: Vorlesungen über Differenzenrechnung. Springer-Verlag. Berlin. 1924. ^[4]
• with René Lagrange as editor: Book: Leçons sur les équations linéaires aux différences finies. Gauthier-Villars. Paris. 1929. ^[5]
• Book: Vermessungsarbeiten in Grönland, Island und Dänemark. Darmstadt. 1939.
• The logarithmic solutions of the hypergeometric equation. K. Dan. Vidensk. Selsk. Mat. Fys. SKR.. 5. 1963. 1–58.

See also

• Nörlund–Rice integral
• Inge Lehmann

Further reading

• Mathematics and Mathematicians: Mathematics in Sweden Before 1950
• Nørlund on Calculus of Differences

Notes and References

1. Bang . Thøger. 10.1098/rsbm.1983.0017 . Niels Erik Norlund. 26 October 1885-4 July 1981 . . 29 . 481–493 . 1983 . 769810. 73395843.
2. Bang . Thøger G. . 10.1007/BF02392293 . Niels Erik Nørlund in memoriam . Acta Mathematica . 161 . 11–22 . 1988 . free .
3. Web site: Catalogue of place names in northern East Greenland . Geological Survey of Denmark . 26 September 2019.
4. Carmichael, R. D.. Robert Daniel Carmichael. Nörlund on Calculus of Differences. Bull. Amer. Math. Soc.. 1925. 31. 8. 445–449. 10.1090/S0002-9904-1925-04088-4. free.
5. Carmichael, R. D.. Nörlund on Finite Differences. Bull. Amer. Math. Soc.. 1930. 36. 1. 25–26. 10.1090/S0002-9904-1930-04861-2. free.