SVEP and compact perturbations
SVEP and compact perturbations
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SVEP 和紧扰动
DOI:
10.1016/j.jmaa.2011.02.036
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发表时间:
2011-08
影响因子:
1.3
通讯作者:
Li, Chun Guang
中科院分区:
文献类型:
--
作者:
Zhu, Sen;Li, Chun Guang
Let H be a complex separable infinite dimensional Hilbert space. In this paper, we prove that an operator T acting on H is a norm limit of those operators with single-valued extension property (SVEP for short) if and only if T⁎, the adjoint of T, is quasitriangular. Moreover, if T⁎is quasitriangular, then, given an ε>0, there exists a compact operator K on H with ‖K‖<ε such that T+K has SVEP. Also, we investigate the stability of SVEP under (small) compact perturbations. We characterize those operators for which SVEP is stable under (small) compact perturbations.
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