Quasi-elliptic equations with degeneration

We study the solvability of boundary value problems for some classes of degenerate quasi-elliptic equations. The main feature of the problems under study is that, despite the degeneration, boundary conditions should still be imposed on the boundary manifolds. We prove the existence and uniqueness theorems for the regular solutions, those having all generalized Sobolev derivatives required in the equation in the inner subdomains. Moreover, we describe some possible enhancements and generalizations of the obtained results.