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Carl Størmer

Størmer's legendary algorithm, originally devised for sun-wind particles trapped in the geomagnetic field, is living on in ``Verlet's algorithm'', widely used in molecular simulation:

$$\vec{\textstyle r}(t_{n+1})=2 \vec{r}(t_{n})-\vec{r}(t_{n-1}) + \vec{a}(t_{n}) \left(\Delta t\right)^{2}$$