Leapfrog integration 蛙跳积分法
(重定向自Leapfrog method)
In mathematics leapfrog integration is a method for numerically integrating differential equations of the form
or equivalently of the form
particularly in the case of a dynamical system of classical mechanics.
The method is known by different names in different disciplines. In particular, it is similar to the velocity Verlet method, which is a variant of Verlet integration. Leapfrog integration is equivalent to updating positions
and velocities
at interleaved time points, staggered in such a way that they "leapfrog" over each other. For example, the position is updated at integer time steps and the velocity is updated at integer-plus-a-half time steps.