A generalization of Saad's bound on harmonic Ritz vectors of Hermitian matrices
A generalization of Saad's bound on harmonic Ritz vectors of Hermitian matrices
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埃尔米特矩阵调和 Ritz 向量上 Saad 界的推广
DOI:
10.1016/j.laa.2016.01.013
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
E. Vecharynski
中科院分区:
文献类型:
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作者:
E. Vecharynski
We prove a Saad's type bound for harmonic Ritz vectors of a Hermitian matrix. The new bound reveals a dependence of the harmonic Rayleigh–Ritz procedure on the condition number of a shifted problem operator. Several practical implications are discussed. In particular, the bound motivates incorporation of preconditioning into the harmonic Rayleigh–Ritz scheme.
DOI:
10.1137/1.9780898718003
发表时间:
2003-05
期刊:
--
影响因子:
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作者:
Y. Saad
通讯作者:
Y. Saad