Highly stable symplectic methods

[ChrisRackauckas]

https://arxiv.org/pdf/1701.02434.pdf

https://arxiv.org/pdf/1405.3153.pdf

[cadojo]

https://arxiv.org/pdf/1701.02434.pdf

https://arxiv.org/pdf/1405.3153.pdf

Found this from Discourse while looking for variable step-size symplectic integrators for astrophysics simulations. In addition to the papers you linked above, does the algorithm linked below meet the goals set by this issue? Or are variable step-size symplectic integrators a separate issue?

https://www.sciencedirect.com/science/article/abs/pii/S0168927498000312

[ChrisRackauckas]

Variable step-size symplectic integrators should be a separate issue. They are quite complex.