It is shown that the recently found non-uniqueness of the third post-Newtonian binary point-mass ADM-Hamiltonian is related to the non-uniqueness at the third post-Newtonian approximation of the applied ADM-coordinate conditions.
Cite
@article{arxiv.gr-qc/9802030,
title = {Non-uniqueness of the third post-Newtonian binary point-mass dynamics},
author = {Piotr Jaranowski and Gerhard Schaefer},
journal= {arXiv preprint arXiv:gr-qc/9802030},
year = {2008}
}