On the spectral problem for three-dimesional bi-Laplacian in the unit sphere
In this work, we introduce a new concept of the stream function and derive the equation for the stream function in the three-dimensional case.To construct a basis in the space of solutions of the NavierStokes system, we solve an auxiliary spectral problem for the bi-Laplacian with Dirichlet conditions on the boundary.Then, using the formulas employ