Hans Freudenthal (17 September 1905 – 13 October 1990) was a Dutch mathematician, who worked in algebraic topology and also created an influential direction in mathematics education.
Introducing the Freudenthal suspension theorem (and the terminology “stem of homotopy groups of spheres”):
On Lie groups:
On teaching mathematics:
Last revised on February 26, 2021 at 12:00:51. See the history of this page for a list of all contributions to it.