A completely integrable system on coadjoint orbits
arXiv:1605.01676
Abstract
We construct a Gelfand-Zeitlin system on a one-parameter family of coadjoint orbits that are multiplicity-free Hamiltonian -spaces. Using this system we prove a lower bound for the Gromov width of these orbits. This lower bound agrees with the known upper bound.
although the concept and results are correct, the work has technical flaws which i do not have time to correct