Dual action of asymptotically isometric copies of $l_p (1\leq p < \infty)$ and $c_0$

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Shutao Chen
Bor-Luh Lin
P.N. Dowling and C.J. Lennard proved that if a Banach space contains an asymptotically isometric copy of $l_1$, then it fails the fixed point property. In this paper, necessary and sufficient conditions for a Banach space to contain an asymptotically isometric copy of $l_p(1\leq p <\infty)$ or $c_0$ are given by the dual action. In particular, it is shown that a Banach space contains an asymptotically isometric copy of $l_1$ if its dual space contains an isometric copy of $l_\infty$, and if a Banach space contains an asymptotically isometric copy of $c_0$, then its dual space contains an asymptotically isometric copy of $l_1$.

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Chen, Shutao; and Lin, Bor-Luh. “Dual action of asymptotically isometric copies of $l_p (1\leq p < \infty)$ and $c_0$”. Collectanea Mathematica, vol.VOL 48, no. 4, pp. 449-58, https://raco.cat/index.php/CollectaneaMathematica/article/view/56403.