Electron. J. Differential Equations, Vol. 2016 (2016), No. 252, pp. 1-9.

A method for solving ill-posed Robin-Cauchy problems for second-order elliptic equations in multi-dimensional cylindrical domains

Berikbol T. Torebek

Abstract:
In this article we consider the Robin-Cauchy problem for multidimensional elliptic equations in a cylindrical domain. The method of spectral expansion in eigenfunctions of the Robin-Cauchy problem for equations with deviating argument establishes a criterion of the strong solvability of the considered Robin-Cauchy problem. It is shown that the ill-posedness of the Robin-Cauchy problem is equivalent to the existence of an isolated point of the continuous spectrum for a self-adjoint operator with the deviating argument.

Submitted

Submitted May 5, 2016. Published September 20, 2016.
Math Subject Classifications: 31A30, 31B30, 35J40.
Key Words: Elliptic equation; Robin-Cauchy problem; self-adjoint operator; ill-posedness.

Show me the PDF file (207 KB), TEX file for this article.

Berikbol T. Torebek
Department of Differential Equations
Department of Fundamental Mathematics
Institute of Mathematics and Mathematical Modeling
125 Pushkin str., 050010 Almaty, Kazakhistan
email: torebek@math.kz

Return to the EJDE web page