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Hermann Schwarz (25 January 1843 – 30 November 1921) was a German mathematician, known for his work in complex analysis. Between 1867 and 1869, he worked at the University of Halle, then at the Swiss Federal Polytechnic in Zurich. From 1875, Schwarz worked at Göttingen University, dealing with the subjects of complex analysis, differential geometry, and the calculus of variations. In 1892, he became a member of the Berlin Academy of Science and a professor at the University of Berlin, where his students included Lipót Fejér, Paul Koebe and Ernst Zermelo. Schwarz's name is attached to many ideas in mathematics. This photograph of Schwarz, taken around 1890, is in the collection of the ETH Library.Photograph credit: Louis Zipfel; restored by Adam Cuerden

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