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**William Richard Maximilian Hugo Threlfall** (25 June 1888, in Dresden – 4 April 1949, in Oberwolfach) was a British-born German mathematician who worked on algebraic topology. He was a coauthor of the standard textbook Lehrbuch der Topologie.

In 1933 he signed the * Vow of allegiance of the Professors of the German Universities and High-Schools to Adolf Hitler and the National Socialistic State *.

- Threlfall, W. (1932), "Gruppenbilder" (PDF),
*Abh. Math.-Phys. Kl. Sächs. Akad. Wiss.*, Leipzig: Hirzel,**41**: 1–59 - Seifert, Threlfall:
*Lehrbuch der Topologie*, Teubner 1934 - Seifert, Threlfall:
*Variationsrechnung im Großen*, Teubner 1938

**Alfred Hermann Fried** was an Austrian Jewish pacifist, publicist, journalist, co-founder of the German peace movement, and winner of the Nobel Peace Prize in 1911. Fried was also a supporter of Esperanto. He is the author of an Esperanto textbook and an Esperanto-German and German-Esperanto dictionary, first published in 1903 and republished in 1905.

**Charles Ehresmann** was a German-born French mathematician who worked in differential topology and category theory.

**Herbert Karl Johannes Seifert** was a German mathematician known for his work in topology.

**Arthur Moritz Schoenflies**, sometimes written as Schönflies, was a German mathematician, known for his contributions to the application of group theory to crystallography, and for work in topology.

**Gustav Adolf Feodor Wilhelm Ludwig Mie** was a German physicist.

**Hieronymus Georg Zeuthen** was a Danish mathematician.

**Rudolf Seeliger** was a German physicist who specialized in electric discharges in gases and plasma physics.

**Leo Königsberger** was a German mathematician, and historian of science. He is best known for his three-volume biography of Hermann von Helmholtz, which remains the standard reference on the subject.

**Ernst Steinitz** was a German mathematician.

**William Fogg Osgood** was an American mathematician.

**Eugen Otto Erwin Netto** was a German mathematician. He was born in Halle and died in Giessen.

**Christian Georg Theodor Ruete** was a German ophthalmologist born in Scharmbeck, Lower Saxony.

The **Faculty of Mathematics and Computer Science** is one of twelve faculties at the University of Heidelberg. It comprises the Institute of Mathematics, the Institute of Applied Mathematics, the School of Applied Sciences, and the Institute of Computer Science. The faculty maintains close relationships to the Interdisciplinary Center for Scientific Computing (IWR) and the Mathematics Center Heidelberg (MATCH). The first chair of mathematics was entrusted to the physician Jacob Curio in the year 1547.

**Harro Heuser** was a German mathematician. In German-speaking countries he is best known for his popular two-volume introduction into real analysis, *Lehrbuch der Analysis*.

**Ludwig Christian Wiener** was a German mathematician who specialized in descriptive geometry. Wiener was also a physicist and philosopher. In 1863, he was the first person to identify qualitatively the internal molecular cause of Brownian motion.

**Friedrich Heinrich Schur** was a German mathematician who studied geometry.

In mathematics, * Lehrbuch der Topologie* is a book by Herbert Seifert and William Threlfall, first published in 1934 and published in an English translation in 1980. It was one of the earliest textbooks on algebraic topology, and was the standard reference on this topic for many years.

**Willi Ludwig August Rinow** was a German mathematician who specialized in differential geometry and topology. Rinow was the son of a schoolteacher. In 1926, he attended the Humboldt University of Berlin, studying mathematics and physics under professors such as Max Planck, Ludwig Bieberbach, and Heinz Hopf. There, he received his doctorate in 1931. In 1933, he worked at the Jahrbuch über die Fortschritte der Mathematik in Berlin. In 1937, he joined the Nazi Party. During 1937—1940, he was an editor of the journal *Deutsche Mathematik*. In 1937, he became a professor in Berlin and lectured there until 1950. His lecturing was interrupted because of his work as a mathematician at the Oberspreewerk in Berlin from 1946 to 1949.

**Horst Schubert** was a German mathematician.

**Adam Wilhelm Siegmund Günther** was a German geographer, mathematician, historian of mathematics and natural scientist.

- Gabriele Dörflinger: William R. M. H. Threlfall
- William Threlfall at the Mathematics Genealogy Project

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