TY JOUR TI On classical and quantum mechanical problem of two material points in three-dimensional Lobachevsky space KW two-body problem in non-Euclidean space KW center of mass KW rigid rotator KW space of constant curvature JO Proceedings of the Komi Science Centre of the Ural Division of the Russian Academy of Sciences AU Kurochkin, Y.A. AU Shaykovskaya,, N.D. AU Shelkovyy, D.V. PY 2023 IS 0 PB FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"