|Died||5 February 1980 (aged 72)|
|Alma mater||University of Warsaw|
University of Paris
|Known for||Aronszajn line|
|Institutions||University of Kansas|
|Doctoral advisor||Maurice René Fréchet|
An Ashkenazi Jew, Aronszajn received his Ph.D. from the University of Warsaw, in 1930, in Poland. Stefan Mazurkiewicz was his thesis advisor. He also received a Ph.D. from Paris University, in 1935; this time Maurice Fréchet was his thesis advisor. He joined the Oklahoma A&M faculty, but moved to the University of Kansas in 1951 with his colleague Ainsley Diamond after Diamond, a Quaker, was fired for refusing to sign a newly instituted loyalty oath. Aronszajn retired in 1977. He was a Summerfield Distinguished Scholar from 1964 to his death.
He introduced, together with Prom Panitchpakdi, the injective metric spaces under the name of "hyperconvex metric spaces". Together with Kennan T. Smith, Aronszajn offered proof of the Aronszajn–Smith theorem. Also, the existence of Aronszajn trees was proven by Aronszajn; Aronszajn lines, also named after him, are the lexicographic orderings of Aronszajn trees.
- Kühn, Heidi, ed. (2004). Biographisch-literarisches Handwörterbuch der exakten Naturwissenschaften. Wiley. p. 32. ISBN 3-527-40330-2.
- Magill, K. D., Jr. (1996), "An interview with John Isbell", Topology Communications, 1 (2).
- Aronszajn, Nachman (1950). "Theory of Reproducing Kernels". Transactions of the American Mathematical Society. 68 (3): 337–404. doi:10.2307/1990404.