Ernst Alfred Ruh, born 23 February 1936, is a Swiss mathematician, specializing in differential geometry.

Ernst Ruh received his doctorate in 1964 from Brown University under Katsumi Nomizu with thesis On the Automorphism Groups of a G-structure.^[1] He is a professor at Ohio State University and a professor of computer science at the University of Basel (1987/89).^[2] In 1990 Ruh became a full professor (professor ordinarius) of mathematics at the University of Fribourg; he was the successor of Josef Schmid.^[2] In 2006 he retired as professor emeritus.

His name is attached to the Gromov-Ruh theorem.^[3] He was an invited speaker at the International Congress of Mathematicians at Berkeley in 1986. He became a fellow of the American Mathematical Society in 2012.

Selected publications[edit]

• with Jaak Vilms: Ruh, Ernst A.; Vilms, Jaak (1970). "The tension field of the Gauss map". Trans. Amer. Math. Soc. 149 (2): 569–573. doi:10.1090/s0002-9947-1970-0259768-5. MR 0259768.
• Ruh, Ernst A. (1971). "Curvature and differentiable structure of spheres". Bull. Amer. Math. Soc. 77: 148–150. doi:10.1090/s0002-9904-1971-12640-x. MR 0270307.
• Ruh, Ernst A. (1971). "Minimal immersions of 2-spheres in S⁴ ". Proc. Amer. Math. Soc. 28: 219–222. doi:10.1090/s0002-9939-1971-0271880-x. MR 0271880.
• with Karsten Grove and Hermann Karcher: Grove, Karsten; Karcher, Hermann; Ruh, Ernst A. (1975). "Group actions and curvature". Bull. Amer. Math. Soc. 81: 89–92. doi:10.1090/s0002-9904-1975-13647-0. MR 0367862.

References[edit]

External links[edit]

• Ernst Ruh: entry in SNF - P3 research database
• Festkolloquium "Geometry and Analysis" for Ernst Ruh (70th birthday)
• Ernst A. Ruh: entry from Microsoft Academic Search