Reinhardt Kiehl German mathematician dead at age 90
a German mathematician, died on January 26, 2026. Born in Herne, North Rhine-Westphalia, on May 31, 1935, he studied mathematics, physics and astronomy from 1955 at the University of Göttingen and the University of Heidelberg. He received his Ph.D. in… · 26 January 2026 · January 2026