Hans Föllmer
![Föllmer in Madrid, 2006](https://upload.wikimedia.org/wikipedia/commons/c/c7/Hans_F%C3%B6llmer_2006.jpg)
Hans Föllmer is widely known for his contributions to probability theory, stochastic analysis and mathematical finance.
In mathematical economics, he made early contributions to the mathematical modeling of social interactions.
In mathematical finance, he made fundamental contributions to the theory of risk measures and the hedging of contingent claims. Provided by Wikipedia