Izvestiya of Saratov University.

Mathematics. Mechanics. Informatics

ISSN 1816-9791 (Print)

ISSN 2541-9005 (Online)

пучок обыкновенных дифференциальных операторов

On 2-fold completeness of the eigenfunctions for the strongly irregular quadratic pencil of differential operators of second order

On Multiple Completeness of the Root Functions of a Certain Class of Pencils of Differential Operators with Constant Coefficients

Multiple Non-Completeness for the System of Eigenfunctions of a Class of the Pencils of Ordinary Differential Operators

On Multiple Completeness of the Root Functions for a Class of the Pencils of Differential Operators

On Multiple Completeness of the Root Functions of the Pencils of Differential Operators with Constant Coefficients

Multiple Completeness of the Root Functions of the Pencils of Differential Operators with Constant Coefficients and Splitting Boundary Conditions