### Lagrange stability

(a quality of some stable orbits)

**Lagrange stability** (of motion) is a criteria for a stability
of a trajectory in a dynamical
system (e.g., a planet in orbit), consisting of a set of inequalities.
Satisfying them sets bounds on the trajectory, i.e., a region within
which the orbit will remain.

(*orbits,celestial mechanics*)
http://www.encyclopediaofmath.org/index.php/Lagrange_stability

http://iopscience.iop.org/1538-3881/117/6/3054/fulltext/980532.text.html

https://arxiv.org/abs/1210.0321

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