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Relative regularity and Riesz operators. (English) Zbl 0499.47011


MSC:

47A53 (Semi-) Fredholm operators; index theories
47B06 Riesz operators; eigenvalue distributions; approximation numbers, \(s\)-numbers, Kolmogorov numbers, entropy numbers, etc. of operators
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References:

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[3] S. Goldberg - E. Thorp , On some open questions concerning strictly singular operators , Proc. Amer. Math. Soc. , 14 ( 1963 ), pp. 334 - 336 . MR 145361 | Zbl 0115.33303 · Zbl 0115.33303 · doi:10.2307/2034637
[4] H. Heuser , Funktionalanalysis , Stuttgart , 1975 . MR 482021 | Zbl 0309.47001 · Zbl 0309.47001
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