Two meters below sea level, what a shame! Only a solid dijk prevents these people in Amsterdam from wet feet, and the beautiful pictures of Carl Runge and Wilhelm Kutta would be seriously damaged.

Here they are ...

Carl David Tolmé Runge (1856-1927) initiated RK methods in 1895, is also famous for his research in complex analysis, spectroscopy, approximation theory, and other fields of applied mathematics. Wilhelm Martin Kutta (1867-1944) brought RK methods 1901 to a first perfection and became also famous for his later work in aerodynamics (jpeg files imported from the WWW pages of Tanja Van Hecke).