Dirichlet problem for an equation of mixed type with two degeneration lines in a rectangular domain

For an equation of elliptic-hyperbolic type with two perpendicular lines of power-law degeneration, we prove a criterion for the uniqueness of the solution of the first boundary value problem by the spectral expansion method. The solution is constructed in the form of the sum of a Fourier-Bessel series.

Ҳали таржима қилинмаган