Leija-Martinez, N.; Alvarez-Castillo, D.E.; Kirchbach, M.
(Symmetry, Integrability and Geometry: Methods and Applications, 2011)
The peculiarity of the Eckart potential problem on H₊² (the upper sheet of the two-sheeted two-dimensional hyperboloid), to preserve the (2l+1)-fold degeneracy of the states typical for the geodesic motion there, is usually ...