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期刊论文
SMALL COMPACT PERTURBATION OF STRONGLY IRREDUCIBLE OPERATORS*
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An operator T on H is called strongly irreducible if T is not similar to any reducible operators, in this paper, we shall say 'yes' to answer the following question raised hy D. A. Herrero. G yen an operator T with connecteg spectrum a(T) and a positive number E, can we find a compact operator K with ‖K‖<E such that T+K is strong y irreducible?
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