A Generalization of Uniformly Rotund Banach Spaces
A Generalization of Uniformly Rotund Banach Spaces
Let X be a real Banach space. According to von Neumann's famous geometrical characterization X is a Hilbert space if and only if for all x, y ∈ X Thus Hilbert space is distinguished among all real Banach spaces by a certain uniform behavior of the set of all two …