Karl Wilhelm Feuerbach

Infobox_Scientist
name = Karl Wilhelm Feuerbach


caption = Karl Wilhelm Feuerbach
birth_date = May 30, 1800, Jena, Germany
death_date = March 12, 1834, Erlangen, Germany
nationality =
field = Mathematician
work_institution = University of Basel
alma_mater = Albert Ludwigs University of Freiburg
known_for = Feuerbach's theorem
religion = Lutheran
footnotes= Brother of Ludwig Andreas Feuerbach

Karl Wilhelm Feuerbach (May 30, 1800 – March 12, 1834) was a German geometer and the son of legal scholar Paul Johann Anselm Ritter von 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. Shortly before his death he introduced homogeneous coordinates, independently of Möbius.

Works

* [http://books.google.com/books?id=azfIjumeVdEC&printsec=frontcover&dq=editions:0fkprMgPRy0IRr3uTaoxXqj#PPP5,M1 Eigenschaften einiger merkwürdigen Punkte des geradlinigen Dreiecks und mehrerer durch sie bestimmten Linien und Figuren: Eine analytisch-trigonometrische Abhandlung] (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)

External links

*
* [http://www.cut-the-knot.org/Curriculum/Geometry/FeuerbachProof.shtml Feuerbach's Theorem: a Proof]
* [http://faculty.evansville.edu/ck6/bstud/feuerba.html Karl Wilhelm Feuerbach: Geometer]
* [http://www.gogeometry.com/center/feuerbach_index.html Feuerbach's Theorem illustrations] at Geometry from the Land of the Incas.