Karl Wilhelm Feuerbach

Short description: German mathematician (1800–1834)

Karl Wilhelm Feuerbach

Born| 30 May 1800 (1800-05-30)

Jena, Saxe-Weimar, Holy Roman Empire

Died| 12 March 1834 (1834-03-13) (aged 33)

Erlangen, Germany

Nationality| German
Alma mater| Albert Ludwigs University of Freiburg
Known for| Feuerbach's theorem
Scientific career
Fields| Mathematician
Institutions| University of Basel
Notes

Brother of Ludwig Andreas Feuerbach

Karl Wilhelm Feuerbach (30 May 1800 - 12 March 1834) was a German geometer and the son of legal scholar Paul Johann Anselm Ritter von Feuerbach, and the brother of philosopher Ludwig Feuerbach. After receiving his doctorate at age 22, he became a professor of mathematics at the Gymnasium at Erlangen. In 1822 he wrote a small book on mathematics noted mainly for a theorem on the nine-point circle, which is now known as Feuerbach's theorem. In 1827 he introduced homogeneous coordinates, independently of Möbius.[1]

## Works

* Eigenschaften einiger merkwürdigen Punkte des geradlinigen Dreiecks und mehrerer durch sie bestimmten Linien und Figuren. Eine analytisch-trigonometrische Abhandlung (Monograph ed.), Nürnberg: Wiessner, 1822, http://resolver.sub.uni-goettingen.de/purl?PPN512512426 . online book at Google Books ("Properties of some special points in the plane of a triangle, and various lines and figures determined by these points: an analytic-trigonometric treatment")
* Grundriss zu analytischen Untersuchungen der dreyeckigen Pyramide ("Foundations of the analytic theory of the triangular pyramid")

## References

1. ↑ "Feuerbach". http://sfabel.tripod.com/mathematik/database/Feuerbach.html.

## External links

* Error in Template:Internet Archive author: Karl Wilhelm Feuerbach doesn't exist.
* O'Connor, John J.; Robertson, Edmund F., "Karl Wilhelm Feuerbach", MacTutor History of Mathematics archive, University of St Andrews, http://www-history.mcs.st-andrews.ac.uk/Biographies/Feuerbach.html .
* Feuerbach's Theorem: a Proof
* Karl Wilhelm Feuerbach: Geometer

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