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math.FA2020
Stability of diametral diameter two properties
Johann Langemets, Katriin Pirk
We prove that the diametral diameter two properties are inherited by -ideals (e.g., -ideals). On the other hand, these properties are lifted from an -ideal to the superspa…
math.FA2020
On Daugavet indices of thickness
Rainis Haller, Johann Langemets, Vegard Lima +2
Inspired by R. Whitley's thickness index the last named author recently introduced the Daugavet index of thickness of Banach spaces. We continue the investigation of the behavior o…
math.FA2020
Symmetric strong diameter two property in tensor products of Banach spaces
Johann Langemets
We continue the investigation of the behaviour of diameter two properties in tensor products of Banach spaces. Our main result shows that the symmetric strong diameter two property…