Our paper in the Journal of the Astronautical Sciences on our new Adaptive Local Variational Iteration Method (ALVIM) for solving astrodynamics problems is now published and available online.
In this work we show 1 – 2 orders of magnitude reduction in function evaluations when compared to finite difference methods. Results are shown for the two-body problem and the CR3BP.
https://link.springer.com/article/10.1007/s40295-023-00366-y