Approximation numbers of nuclear operators and geometry of Banach spaces
We give conditions on Banach spaces \(E\) and \(F\) which guarantee that, for every nuclear operator from \(E\) into \(F\), the sequence of approximation numbers belongs to the Marcinkiewicz space \(\ell_{s,\infty}\) with \(1\leq s<\infty\).
scientific article; zbMATH DE number 62229
scientific article