collaborators

4 papers

math.FA2026

On the Bollobás theorem for complex -spaces

Sheldon Dantas, Helena del Río

Let and be compact Hausdorff spaces. We prove a Bollobás-type theorem for operators between complex spaces of continuous functions. More precisely, every operator that alm…

math.FA2026

A group action approach to the Daugavet property

Sheldon Dantas, Helena del Río, Tomáš Raunig

We introduce the -Daugavet property (-DPr, for short) for Banach spaces endowed with an action of a group by surjective linear isometries. This notion provides a common f…

math.FA2025

Bollobás-type theorems for range strongly exposing operators

Helena Del Río

We study Bollobás-type theorems for range strongly exposing operators. When such a theorem holds for operators from a Banach space into another Banach space , we say that t…

math.FA2025

Range strongly exposing operators between Banach spaces

Geunsu Choi, Helena del Río, Audrey Fovelle +2

We introduce a new class of bounded linear operators, called range strongly exposing (RSE) operators, which form a natural intermediate class: weaker than Bourgain's absolutely str…