The Infinite Bi-Lanczos Method for Nonlinear Eigenvalue Problems
The Infinite Bi-Lanczos Method for Nonlinear Eigenvalue Problems
复制标题
非线性特征值问题的无限 Bi-Lanczos 方法
DOI:
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发表时间:
2016
影响因子:
3.1
通讯作者:
E. Jarlebring
中科院分区:
文献类型:
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作者:
S. W. Gaaf;E. Jarlebring
We propose a two-sided Lanczos method for the nonlinear eigenvalue problem (NEP). This two-sided approach provides approximations to both the right and left eigenvectors of the eigenvalues of interest. The method implicitly works with matrices and vectors of infinite size, but because particular (starting) vectors are used, all computations can be carried out efficiently with finite matrices and vectors. We specifically introduce a new way to represent infinite vectors that span the subspace corresponding to the conjugate transpose operation for approximating the left eigenvectors. Furthermore, we show that also in this infinite-dimensional interpretation the short recurrences inherent to the Lanczos procedure offer an efficient algorithm regarding both the computational cost and the storage.