What Greek mathematician who spend most of his professional life in Germany lends his name to the Vitali–Carathéodory theorem?
Vitali–Carathéodory theorem In mathematics, the Vitali–Carathéodory theorem is a result in real analysis that shows that, under the conditions stated below, integrable functions can be approximated in L from above and below by lower- and upper-semicontinuous functions, respectively. It is named after Giuseppe Vitali and Constantin Carathéodory.
Sophus Lie Marius Sophus Lie ( ; ] ; 17 December 1842 – 18 February 1899) was a Norwegian mathematician. He largely created the theory of continuous symmetry and applied it to the study of geometry and differential equations.