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Approximation from the space of compact operators and other M-ideals. (English) Zbl 0332.47024

##### MSC:
 47D03 Groups and semigroups of linear operators 47B06 Riesz operators; eigenvalue distributions; approximation numbers, $$s$$-numbers, Kolmogorov numbers, entropy numbers, etc. of operators 47A30 Norms (inequalities, more than one norm, etc.) of linear operators
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