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Gasymov, M.G. and Mirzoev, S.S. (1992) On Solvability Boundary Value Problems for Elliptic Type Operator Differential Equations of Second Order. Different Uravnenie, 28, 651-666. (In Russian)

has been cited by the following article:

• TITLE: Solvability of a Class of Operator-Differential Equations of Third Order with Complicated Characteristic on the Whole Real Axis

  AUTHORS: Abdel Baset I. Ahmed, Mohamed A. Labeeb

  KEYWORDS: Operator-Differential Equation, Hilbert Space, Self-Adjoint Operator, Intermediate Derivative Operator

  JOURNAL NAME: Open Access Library Journal, Vol.5 No.6, June 26, 2018

  ABSTRACT: On the whole real axis, we demonstrate sufficient conditions of regular solvability of third order operator-differential equations with complicated characteristics. These conditions were formulated only by the operator coefficients of the equation. In addition, by the principal part of the equation, the norms of the operators of intermediate derivative were estimated.