  Spin 1 particle in Pauli approximation is investigated on the background of
the curved space of constant negative curvature, Lobachevsky space.
Nonrelativistic approximation is performed in the system of 10 equations
resulted from separating the variables in Duffin-Kemmer equation specified in
quasi-cartesian coordinates. The problem is solved exactly in Bessel functions,
the quantum states are determined by four quantum numbers. The treatment is
substantially based on the use of a generalized helicity operator in
Lobachevsky space model.
