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Results tagged with banach-spaces
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user 21936
A Banach space is a complete normed vector space: A vector space equipped with a norm such that every Cauchy sequence converges.
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weak*-closed subspaces
Recall that a closed subspace $Y$ of a Banach space $X$ is weakly complemented if the set
$$Y^{\bot}:= \{ f\in X^*| f(y) = 0 \forall y\in Y\}$$
is a complemented subspace of $ X^*$. For example, $c_0$ …
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