计算物理 ›› 1994, Vol. 11 ›› Issue (4): 451-456.

• 论文 • 上一篇    下一篇

Jacobi矩阵特征值反问题

戴华   

  1. 南京航空航天大学数理力学系, 210016
  • 收稿日期:1993-03-19 修回日期:1994-03-10 出版日期:1994-12-25 发布日期:1994-12-25
  • 基金资助:
    国家自然科学基金

INVERSE EIGENVALUE PROBLEM FOR JACOBI MATRICES

Dai Hua   

  1. Nanjing Aeronautical and Astronautical University, 210016
  • Received:1993-03-19 Revised:1994-03-10 Online:1994-12-25 Published:1994-12-25

摘要: 研究如下一类Jacobi矩阵特征值反问题:问题IEP:给定两个互异实数λ,μ(λ<μ)和两个n维非零实向量x,y,求n阶Jacobi矩阵J,使得(λ,x),(μ,y)分别恰是J的第i,j(ij)个特征对。还分析了Jacobi矩阵的特征性质,给出了一个特征对恰是Jacobi矩阵J的第i个特征对的充分必要条件,由此导出了问题IEP有解的充分必要条件。

关键词: 特征值, 特征向量, 反问题, Jacobi矩阵

Abstract: The following inverse eigenvalue problem for Jacobi matrices is considered: Problem IEP.Given λ,μR(λ<μ and x,yRn,x≠0,y≠0, find n×n Jacobi matrix J such that (λ,x) and (μ,y) are exactly the i-th and j-th (i≠j) eigenpairs of the Jacobi matrix J, respectively. The eigenanalysis of Jacobi matrices is given. The necessary and sufficient condition is obtained for one eigenpair to be exactly the i-th eigenpair of a Jacobi matrix. Some necessary and sufficient conditions for existence of solution of the Problem IEP are given.

Key words: characteristic value, characteristic vector, inverse problem, Jacobi matrix

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