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Dongyang Chen
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Subspaces of $L_{p}(2<p<\infty)$

Let $p>2$. Let $X$ be a subspace of $L_{p}$. Kadec and Pelczynski proved that either $X$ is isomorphic to $l_{2}$ or $X$ contains a subspace isomorphic to $l_{p}$. My question is: if $X$ is isomorphic to $l_{2}$, does $X$ contain a subspace that is $(1+\epsilon)$-isomorphic to $l_{2}$?

Thank you!

Dongyang Chen
  • 3.3k
  • 1
  • 13
  • 16