Karl Rohn

Karl Friedrich Wilhelm Rohn ( born January 25, 1855 in Swan 's home; † August 4, 1920 in Leipzig ) was a German mathematician who worked on geometry.

Life

Karl Rohn studied in Darmstadt, Leipzig and Munich, including Alexander von Brill, who was leading him from an initial engineering studies to mathematics. In 1878 he earned his doctorate under Felix Klein in Munich. In 1879 he qualified as a professor in Leipzig. Subject of doctoral and habilitation was the Kummer surface of 4th order and their relationship with hyperelliptic functions (with Riemann surfaces of genus 2). He thus broke a then current research topic, about which even small self, Arthur Cayley and Heinrich Weber had tried. In 1884 he became an associate professor at the University of Leipzig and a year later at the Technical University Dresden, where he became in 1887 Professor of Descriptive Geometry. In 1904 he became a professor in Leipzig.

In addition to his work on the Kummer surface and other algebraic surfaces, he also studied algebraic space curves, and there completed the classification work of Georges Halphen and Max Noether. He also established a trammel.

In 1913 he was president of the German Mathematical Society.

Writings

• The different shapes of the Kummer'schen surface. In: Mathematische Annalen. 18 band. Leipzig 1881, pp. 99-159. (online)
• With Erwin Papperitz: Textbook of Descriptive Geometry, 2 vols, Leipzig 1893, 1896.
• With L. Berzolari: Algebraic space curves and developable surfaces. In: Encyclopedia of mathematical sciences. Published 1926. (Online)