On factorization of operators through the spaces \(l^p.\)

We give conditions on a pair of Banach spaces \(X\) and \(Y,\) under which each operator from \(X\) to \(Y,\) whose second adjoint factors compactly through the space \(l^p,\) \(1\le p\le+\infty\), itself compactly factors through \(l^p.\) The conditions are as follows: either the space \(X^*,\) or...

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Published in:arXiv.org 2001-07
Main Author: Reinov, Oleg I
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Language:English
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Banach spaces
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description We give conditions on a pair of Banach spaces \(X\) and \(Y,\) under which each operator from \(X\) to \(Y,\) whose second adjoint factors compactly through the space \(l^p,\) \(1\le p\le+\infty\), itself compactly factors through \(l^p.\) The conditions are as follows: either the space \(X^*,\) or the space \(Y^{***}\) possesses the Grothendieck approximation property. Leaving the corresponding question for parameters \(p>1, p\neq 2,\) still open, we show that for \(p=1\) the conditions are essential.
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title On factorization of operators through the spaces \(l^p.\)
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