On solutions of Schrodinger and Dirac equations in spaces of constant   curvature, spherical and elliptical models
  Exact solutions of the Schrodinger and Dirac equations in generalized cylindrical coordinates of the 3-dimensional space of positive constant curvature, spherical model, have been obtained. It is shown that all basis Schrodinger's and Dirac's wave functions are finite, single-valued, and continuous everywhere in spherical space model S_{3}. The used coordinates (\rho, \phi,z) are simply referred to Eiler's angle variables (\alpha, \beta, \gamma), parameters on the unitary group SU(2), which permits to express the constructed wave solutions \Psi(\rho, phi,z) in terms of Wigner's functions $D_{mm'}^{j}(\alpha, \beta, \gamma)$. Specification of the analysis to the case of elliptic, SO(3.R) group space, model has been done. In so doing, the results substantially depend upon the spin of the particle. In scalar case, the part of the Schrodinger wave solutions must be excluded by continuity considerations, remaining functions are continuous everywhere in the elliptical 3-space. The latter is in agrement with the known statement: the Wigner functions D_{mm'}^{j}(\alpha, \beta, \gamma) at j =0,1,2,... make up a correct basis in SO(3.R) group space. For the fermion case, it is shown that no Dirac solutions, continuous everywhere in elliptical space, do exist. Description of the Dirac particle in elliptical space of positive constant curvature cannot be correctly in the sense of continuity adjusted with its topological structure. 
V.M. Red'kov