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

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Radii and centers in Banach spaces

I believe that the property does not hold for all Banach spaces, but my counterexample is a little involved. If you've the patience then follow me through... Let $V=\bigoplus_{n=1}^\infty \ell^n_2$ …
J Bytheway's user avatar