Rudolf Friedrich Alfred Clebsch (19 January 1833 – 7 November 1872) was a German mathematician who made important contributions to algebraic geometry and invariant theory. He attended the University of Königsberg and was habilitated at Berlin. He subsequently taught in Berlin and Karlsruhe. His collaboration with Paul Gordan in Giessen led to the introduction of Clebsch–Gordan coefficients for spherical harmonics, which are now widely used in quantum mechanics. Together with Carl Neumann at Göttingen, he founded the mathematical research journal Mathematische Annalen in 1868. In 1883 Saint-Venant translated Clebsch's work on elasticity into French and published it as Théorie de l'élasticité des Corps Solides. Books by A. Clebsch Vorlesungen über Geometrie (Teubner, Leipzig, 1876-1891) edited by Ferdinand Lindemann. Théorie der binären algebraischen Formen (Teubner, 1872) Theorie der Abelschen Functionen with P. Gordan (B. G. Teubner, 1866) Theorie der Elasticität fester Körper (B. G. Teubner, 1862) See also Clebsch graph Clebsch representation Clebsch surface Eigenvalues and eigenvectors Helmholtz equation Hyperboloid model Pentagram map Quaternary cubic References External links 1832 births 1872 deaths 19th-century German mathematicians Algebraic geometers Scientists from Königsberg People from the Province of Prussia University of Königsberg alumni Academic staff of the Humboldt University of Berlin Academic staff of the Karlsruhe Institute of Technology Academic staff of the University of Giessen Academic staff of the University of Göttingen