%0 Journal Article
%T The universality of $\ell_1$ as a dual space
%A Daniel Freeman
%A Edward Odell
%A Thomas Schlumprecht
%J Mathematics
%D 2009
%I arXiv
%X Let $X$ be a Banach space with a separable dual. We prove that $X$ embeds isomorphically into a $\cL_\infty$ space $Z$ whose dual is isomorphic to $\ell_1$. If, moreover, $U$ is a space so that $U$ and $X$ are totally incomparable, then we construct such a $Z$, so that $Z$ and $U$ are totally incomparable. If $X$ is separable and reflexive, we show that $Z$ can be made to be somewhat reflexive.
%U http://arxiv.org/abs/0904.0462v2