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О кратной полноте корневых функций пучков дифференциальных операторов с постоянными коэффициентами

О кратной полноте корневых функций пучков дифференциальных операторов с постоянными коэффициентами

Abstract

Рассматривается класс пучков обыкновенных дифференциальных операторов n-го порядка с постоянными коэффициентами. Предполагается, что корни характеристического уравнения пучков этого класса лежат на одной прямой, проходящей через начало координат, таким образом, что один корень лежит по одну сторону от начала координат, а остальные по другую сторону. Описываются случаи, когда система корневых функций m-кратно (3 ≤ m ≤ n − 1) полна в пространстве суммируемых с квадратом функций на основном отрезке.

A class of the pencils of ordinary differential operators of n-th order with constant coefficients is considered. The roots of the characteristic equation of the pencils from this class are supposed to lie on a straight line containing the origin, provided that one of the roots lies on one part from the origin, the rest lie on another part. The cases when the system of root functions is m-fold (3 ≤ m ≤ n − 1) complete in the space of square summable functions onmain interval are described.

Keywords

ПУЧОК ОБЫКНОВЕННЫХ ДИФФЕРЕНЦИАЛЬНЫХ ОПЕРАТОРОВ, КРАТНАЯ ПОЛНОТА, КОРНЕВЫЕ ФУНКЦИИ

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average