Karl Wilhelm Feuerbach

Karl Wilhelm Feuerbach (1800 to 1834) was a German geometer, the son of the legal scholar Paul Johann Anselm Ritter von Feuerbach and the brother of the philosopher Ludwig Feuerbach. He received his doctorate at the age of 22 and then became a professor of mathematics at the Gymnasium at Erlangen. In 1822 he wrote a small book on the properties of special points of the plane triangle, noted mainly for a theorem on the nine-point circle that is now known as Feuerbach's theorem. In 1827 he introduced homogeneous coordinates, independently of Moebius. His other work was a study of the foundations of the analytic theory of the triangular pyramid. He died in 1834, aged only 33.