Pertubation bounds for the definite generalized eigenvalue problem

Pertubation bounds for the definite generalized eigenvalue problem
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DOI:
10.1016/0024-3795(79)90094-6
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发表时间:
1979-02
影响因子:
1.1
通讯作者:
G. Stewart
G. Stewart
中科院分区:
数学3区
文献类型:
--
作者:
G. Stewart

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设A和B是厄米特矩阵,且设c(A,B)= inf{|xH(A+iB)x|:= 1}。特征值问题Ax =λ Bx称为定的,如果(A,B)>0.证明了一个确定的问题有一个完备的特征向量系,且其特征值是真实的。在A和B的扰动下,本征值的行为类似于厄米特矩阵的本征值,因为本征值与扰动的本征值存在1-1配对,并且它们的差有一个统一的界(在这种情况下是弦度量)。扰动界的特征向量和特征空间。
LetAandBbe Hermitian matrices, and letc(A,B) = inf{|xH(A+iB)x|:‖ = 1}. The eigenvalue problemAx=λBxis called definite ifc(A,B)>0. It is shown that a definite problem has a complete system of eigenvectors and that its eigenvalues are real. Under pertubations ofAandB, the eigenvalues behave like the eigenvalues of a Hermitian matrix in the sense that there is a 1-1 pairing of the eigenvalues with the perturbed eigenvalues and a uniform bound for their differences (in this case in the chordal metric). Pertubation bounds are also developed for eigenvectors and eigenspaces.