고전 케플러-쿨롱 시스템
메모
- $\vec{A} = \left(p \times L\right) - m k\cdot \frac{\mathbb{r}}{r}$
- http://physics.stackexchange.com/questions/tagged/runge-lenz-vector
- http://analyticphysics.com/Runge%20Vector/The%20Symmetry%20Corresponding%20to%20the%20Runge%20Vector.htm
리뷰, 에세이, 강의노트