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Banach spaces, function spaces, real functions, integral transforms, theory of distributions, measure theory.

5 votes
2 answers
217 views

On the closed convex hull of a weakly compact set

Let $H$ be an infinite-dimensional real Hilbert space and let $B$ be the closed unit ball of $H$. Let $K\subset B$ be a weakly compact set whose closed convex hull agrees with $B$. Question: does $K$ …
Biagio Ricceri's user avatar
4 votes
0 answers
133 views

Weakly compact sets forced to contain $0$

Let $E$ be an infinite-dimensional real normed space and let $K\subset E$ be a weakly compact set such that, for each $\varphi\in E^*\setminus \{0\}$, there exists a unique $\tilde x\in K$ such that $ …
Biagio Ricceri's user avatar