Herbert Grötzsch

Camillo Herbert Grötzsch (21 May 1902 – 15 May 1993) was a German mathematician. He was born in Döbeln and died in Halle. Grötzsch worked in graph theory. He was the discoverer and eponym of the Grötzsch graph, a triangle-free graph that requires four colors in any graph coloring, and Grötzsch's theorem, the result that every triangle-free planar graph requires at most three colors. He also introduced the concept of a quasiconformal mapping. He was one of Paul Koebe's students.

The Grötzsch graph
Herbert Grötzsch (right) on his 86th birthday in Halle, with Horst Tietz

Publications
  • Herbert Grötzsch, Über die Verzerrung bei schlichten nicht-konformen Abbildungen und über eine damit zusammenhängende Erweiterung des Picardschen Satzes, Sitzungsberichte sächs. Akad. Wiss., Math.-Phys. Klasse, vol. 80, 1928, pp. 503–507
gollark: Hey, I'm not saying I'm not.
gollark: You're vaguely "privileged" in that you're in a country which can afford to do that.
gollark: Also, I suspect most people don't actually care very much. I mean, abstractly, if you ask people "would you like people to not get malaria/be cured of malaria", they'll say yes. But people generally do *not* really care enough to actually pay the various charities which are able to provide malaria nets and stuff, despite these being extremely effective at lives saved per $.
gollark: Declaring something a right doesn't magically solve all the huge logistical hurdles in getting everyone ever the relevant treatment tsuff.
gollark: Huh, wow.

References
  • Herbert Grötzsch at the Mathematics Genealogy Project
  • Reiner Kühnau, Herbert Grötzsch zum Gedächtnis. Jahresbericht der Deutschen Mathematiker-Vereinigung, vol. 99, 1997, pp. 122–145 (1997)
  • Reiner Kühnau, Einige neuere Entwicklungen bei quasikonformen Abbildungen. Jahresbericht Deutscher Mathematikervereinigung, vol. 94, pp. 141–192 (1992)
  • Horst Tietz, Herbert Grötzsch in Marburg. Jahresbericht der Deutschen Mathematiker-Vereinigung, vol. 99, 1997, pp.146–148
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