What Greek mathematician who spend most of his professional life in Germany lends his name to the Vitali–Carathéodory theorem?
Constantin Carathéodory Constantin Carathéodory (Greek: Κωνσταντίνος Καραθεοδωρή "Konstantinos Karatheodori"; 13 September 1873 – 2 February 1950) was a Greek mathematician who spent most of his professional career in Germany. He made significant contributions to the theory of functions of a real variable, the calculus of variations, and measure theory. His work also includes important results in conformal representations and in the theory of boundary correspondence. In 1909, Carathéodory pioneered the "Axiomatic Formulation of Thermodynamics" along a purely geometrical approach.
Abdias Treu Abdias Treu (sometimes spelled Trew) (29 July 1597 – 12 April 1669) was a German mathematician and academic. He was the professor of mathematics and physical science at the University of Altdorf from 1636-1669. He is best known for his contributions to the field of astronomy. He also contributed writings on the mathematical nature of music theory. He is the grandfather of physician and botanist .