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Ranges of products of operators. (English) Zbl 0259.47003


MSC:

47A10 Spectrum, resolvent
47B06 Riesz operators; eigenvalue distributions; approximation numbers, \(s\)-numbers, Kolmogorov numbers, entropy numbers, etc. of operators
47B99 Special classes of linear operators
46H10 Ideals and subalgebras
47L10 Algebras of operators on Banach spaces and other topological linear spaces
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