Abstract:
It is proved that a weakly closed subset of a Banach space is convex if and only if it can be represented as the sum of sets of arbitrarily small diameter.
Citation:
M. M. Roginskaya, V. S. Shul'man, “On Minkowski Sums of Many Small Sets”, Funktsional. Anal. i Prilozhen., 52:3 (2018), 88–91; Funct. Anal. Appl., 52:3 (2018), 232–235