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Кратные собственные числа матрицы с элементами, полиномиально зависящими от параметра

Кратные собственные числа матрицы с элементами, полиномиально зависящими от параметра

Abstract

Матрицы, имеющие кратные собственные числа, рассматривались ранее в основном с теоретической точки зрения. Однако в последнее время такие вырожденные матрицы представляют и практический интерес, поскольку они возникают в задачах квантовой механики, ядерной физики, оптики, динамики механических систем. В данной работе рассматривается квадратная матрица, элементы которой суть линейные функции параметра. Предлагается метод, позволяющий за конечное число алгебраических операций над элементами матрицы построить полином, корни которого значения параметра, соответствующие кратным собственным числам матрицы. Имеется возможность обобщения предложенного метода для матриц, элементы которых являются полиномами от параметра степени выше первой. Приводится численный пример, иллюстрирующий работу этого метода. Библиогр. 16 назв.

Earlier matrices with multiple eigenvalues were considered only for theoretical purposes. However, now such non-generic matrices are also of practical interest because they appear in different problems of quantum mechanics, nuclear physics, optics and dynamic of mechanical systems. A square matrix with elements that are linearly dependent on a parameter is considered in this paper. A method to find the values of the parameter such that the matrix has a repeated eigenvalue is considered. We find the polynomial whose roots are these values of the parameter using only finite number of algebraic operations on the matrix elements. The method can be generalized to matrices with elements algebraically dependent on a parameter. A numerical example of how to find the required parameter values is considered. Refs 16.

Keywords

КРОНЕКЕРОВСКОЕ ПРОИЗВЕДЕНИЕ,МЕТОД ЛЕВЕРЬЕ,СУММЫ НЬЮТОНА,KRONECKER PRODUCT,THE LEVERRIER METHOD,THE NEWTON SUMS

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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
gold