Geodesic
Pitt's theorem for the Lorentz and Orlicz sequence spaces
Matematičeskie zametki, Tome 61 (1997) no. 1, pp. 18-25.

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Let $L(X,Y)$ be the Banach space of all continuous linear operators from $X$ to $Y$, and let $K(X,Y)$ be the subspace of compact operators. Some versions of the classical Pitt theorem (if $p>q$, then $K(\ell_p,\ell_q)=L(\ell_p,\ell_q)$) for subspaces of Lorentz and Orlicz sequence spaces are established. 
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E. A. Jausekle; È. F. Oja. Pitt's theorem for the Lorentz and Orlicz sequence spaces. Matematičeskie zametki, Tome 61 (1997) no. 1, pp. 18-25. http://geodesic.mathdoc.fr/item/MZM_1997_61_1_a2/

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