Asymptotically isometric copies of c0 and l1 in quotients of Banach spaces

Autores: Dongyang Chen
Localización: Collectanea mathematica, ISSN 0010-0757, Vol. 55, Fasc. 3, 2004, págs. 237-242
Idioma: inglés
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Resumen
- Let $X$ be a real Banach space that does not contain a copy of $\ell^1$. Then $X^\ast$ contains asymptotically sometric copies of $\ell^1$ if and only if $X$ has a quotient which is asymptotically isometric to $c_0$.