activity
20122025
most citedRemarks on diameter 2 properties

39 citations · 63 across the 14 of their papers we have counts for

collaborators

22 papers

math.FA2025

Duality of Lipschitz-free spaces over ultrametric spaces

Trond A. Abrahamsen, Vegard Lima, Andre Ostrak

We give a metric characterisation of when the Lipschitz-free space over a separable ultrametric space is a dual Banach space. In the case where the Lipschitz-free space has a predu…

math.FA2024

Strictly convex norms and the local diameter two property

Trond A. Abrahamsen, Petr Hájek, Vegard Lima +1

We introduce and study a strict monotonicity property of the norm in solid Banach lattices of real functions that prevents such spaces from having the local diameter two property.…

math.FA2023

A relative version of Daugavet-points and the Daugavet property

Trond A. Abrahamsen, Ramón J. Aliaga, Vegard Lima +4

We introduce relative versions of Daugavet-points and the Daugavet property, where the Daugavet-behavior is localized inside of some supporting slice. These points present striking…

math.FA2023★ 4 cited

Delta-points and their implications for the geometry of Banach spaces

Trond A. Abrahamsen, Ramón J. Aliaga, Vegard Lima +4

We show that the Lipschitz-free space with the Radon--Nikodým property and a Daugavet point recently constructed by Veeorg is in fact a dual space isomorphic to . Furthermo…

math.FA2022

Asymptotic geometry and delta-points

Trond A. Abrahamsen, Vegard Lima, André Martiny +1

We study Daugavet- and -points in Banach spaces. A norm one element is a Daugavet-point (respectively a -point) if in every slice of the unit ball (respectively in every…

math.FA2020

Delta-points in Banach spaces generated by adequate families

Trond A. Abrahamsen, Vegard Lima, André Martiny

We study delta-points in Banach spaces generated by adequate families where . In the case the familiy is regular and…