This article is cited in 4 papers

The Dirichlet problem for an equation of mixed elliptic-hyperbolic type with variable potential

N. V. Martem'yanova

Chair of Mathematics and Teaching Principles, Volga Region Social-Humanitarian Academy, 26 Antonov-Ovseenko str., Samara, 443090 Russia

Abstract: We study the Dirichlet problem for an equation of mixed elliptic-hyperbolic type with variable potential in the rectangular area. We establish a criterion of the uniqueness of a solution to this problem. The uniqueness of a solution is proved on the basis of the completeness of systems of functions corresponding to one-dimensional spectral problem. Solution was constructed as a sum of series on the systems of eigenfunctions. The existence is proved under certain conditions upon the ratio of the rectangle sides of hyperbolic part of the equation, upon the boundary functions and function of potential.

Keywords: mixed type equation, Dirichlet problem, spectral method, uniqueness, small denominators, existence.

UDC: 517.95

Received: 07.04.2014

 English version: Russian Mathematics (Izvestiya VUZ. Matematika), 2015, 59:11, 36–44

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