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Theme: Constantin Carathéodory (1873-1950) was one of the most important mathematicians of the 20th century. He published most of his works in German and was highly esteemed by great scientists, such as Einstein and Max Planck.Hec was a Greek mathematician who spent most of his professional career in Germany. He made significant contributions to real and complex analysis, the calculus of variations, and measure theory. He also created an axiomatic formulation of thermodynamics. Carathéodory is considered one of the greatest mathematicians of his era and the most renowned Greek mathematician since antiquity.