Rüdiger Thiele
Rolf-Rüdiger Thiele (born 29 April 1943 in Polepp, Bohemia) is a German mathematician and historian of mathematics, known for his historical research on Hilbert's twenty-fourth problem. Education and career. Thiele studied mathematics, physics, and psychology at the Martin Luther University of Halle-Wittenberg and received his promotion (Ph.D.) there in 1973. He then worked in the publishing business in Leipzig for B. G. Teubner Verlag and Salomon Hirzel Verlag. From 1986 to 2008 he worked at the "Karl-Sudhoff-Institut für Geschichte der Medizin und der Naturwissenschaften" (Karl Sudhoff Institute for the History of Medicine  and Natural Sciences) at the University of Leipzig. He has held visiting positions at the Johannes Gutenberg University Mainz (from 1992 to 1995 as chair for the history of natural sciences), at TU Darmstadt, at the University of Bonn (from 1995 to 1996), and at the University of Toronto. In 2001 Thiele habilitated in the department of mathematics at the University of Hamburg with his work "Von der Bernoullischen Brachistochrone zum Kalibratorkonzept" (From the Bernoullian brachistochrone to the calibrator concept). His habilitation thesis was published in the series " Collection de travaux de l'Académie internationale d'Histoire des Sciences ", Brepols Verlag, Turnhout . In 2002 he became a privatdozent in the department of mathematics at the University of Leipzig. In 2004 he was awarded the Lester R. Ford Award of the Mathematical Association of America for his expository article on Hilbert's cancelled 24th problem. He discovered the 24th problem in an unpublished notebook among Hilbert's "Nachlass". Thiele is the vice president of the Euler Society. His most important works deal with the biographies of Leonhard Euler, Bartel Leendert van der Waerden, David Hilbert, Felix Klein. Central topics in his historical research are analysis and the calculus of variations. In his writings  Thiele uses numerous previously unpublished sources. In addition to numerous book publications and specialist articles on various questions in the history of mathematics, he has published several books on mathematical games in recreational mathematics (often in collaboration with Konrad Haase).