Karl Wilhelm Feuerbach

From Wikipedia, the free encyclopedia

Karl Wilhelm Feuerbach
Karl Wilhelm Feuerbach
Born	May 30, 1800, Jena, Germany
Died	March 12, 1834, Erlangen, Germany
Nationality	German
Fields	Mathematician
Institutions	University of Basel
Alma mater	Albert Ludwigs University of Freiburg
Known for	Feuerbach's theorem
Notes 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.

[edit] Works

• 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)

[edit] External links

• O'Connor, John J. & Robertson, Edmund F., “Karl Wilhelm Feuerbach”, MacTutor History of Mathematics archive 
• Feuerbach's Theorem: a Proof
• Karl Wilhelm Feuerbach: Geometer
• Feuerbach's Theorem illustrations at Geometry from the Land of the Incas.