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math.FA2025
Almost preserved extreme points
Ramón J. Aliaga, Luis C. García-Lirola, Juan Guerrero-Viu +2
In this paper we introduce the notion of an almost preserved extreme point (APEP) of a set as a weakening of the concept of preserved extreme points, and we systematically study su…
math.FA2025
A covering index for Banach spaces
Matias Raja
We introduce a new isomorphic quantity for Banach spaces, the index , based on finite convex coverings of the unit ball. This index is closely related to the asymptotic moduli…