Mathematics – Functional Analysis
Scientific paper
2010-05-04
Mathematics
Functional Analysis
9 pages
Scientific paper
Let $X$ be a Banach space. We prove that, for a large class of Banach or quasi-Banach spaces $E$ of $X$-valued sequences, the sets $E-\bigcup _{q\in\Gamma}\ell_{q}(X)$, where $\Gamma$ is any subset of $(0,\infty]$, and $E-c_{0}(X)$ contain closed infinite-dimensional subspaces of $E$ (if non-empty, of course). This result is applied in several particular cases and it is also shown that the same technique can be used to improve a result on the existence of spaces formed by norm-attaining linear operators.
Botelho Geraldo
Diniz Diogo
Fávaro Vinícius V.
Pellegrino Daniel
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