We show that critical points at infinity in the 3-body problem in
R4 do not realize the infimum of the energy. This completes our
previous work [Journal of Geometric Mechanics, 12, pp323-341 (2020),
doi:10.3934/jgm.2020012] on the existence of Lyapunov stable relative periodic
orbits in the 3-body problem in R4.Comment: 6 pages, 1 figur