Volterra Property of an Problem of the Frankl Type for an Parabolic-Hyperbolic Equation

In the paper spectral properties of non-local boundary value problem for an equation of the parabolic-hyperbolic type is investigated. The non-local condition binds the solution values at points on boundaries of the parabolic and hyperbolic parts of the domain with each other. This problem was first formulated by T.Sh. Kal'menov and M.A. Sadybekov. They proved the unique strong solvability of the problem. One special case of this problem was investigated in more detail in the work of G. Dildabek. A boundary value problem for the heat equation with conditions of the Samarskii-Ionlin type arises in solving this problem. In this paper, we show in what case this boundary value problem does not have eigenvalues.