Abstract
Recorded are some biographical data about the late professor Freudenthal along with some indications about his mathematical work. In an appendix a tiny part of his mathematical work which can be explained in a fairly direct manner is discussed.
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This is the somewhat modified text of a commemorative address given at the annual meeting of the Wiskundig Genootschap, the Dutch mathematical society, on April 5, 1991, cf. Nieuw Archief voor Wiskunde, 9 (1991), 131–136.
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Van Est, W.T. Hans Freudenthal (17 September 1905–13 October 1990). Educ Stud Math 25, 59–69 (1993). https://doi.org/10.1007/BF01274102
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DOI: https://doi.org/10.1007/BF01274102