Kurt Werner Friedrich Reidemeister (13 October 1893 – 8 July 1971) was a mathematician born in Braunschweig (Brunswick), Germany.

[1][2][3] He became interested in differential geometry; he edited Wilhelm Blaschke's second volume on the topic,[4] and both made an acclaimed contribution to the Jena DMV conference in September 1921.

While there he became familiar with the work of Wilhelm Wirtinger on knot theory, and became closely connected to Hans Hahn and the Vienna Circle.

In 1925 he became a full professor at the University of Königsberg; he stayed until 1933, when he was regarded politically unsound by the Nazis and dismissed from his position.

[8] Blaschke managed to get a promise about Reidemeister's reappointment, and in autumn 1934 he got the chair of Kurt Hensel at the University of Marburg.