Q-points, Q-measures, and L-orthogonality

Luis David Reyes Sáenz (UNAM, Mexico City)

Mar 21. 2025, 11:20 — 11:40

The concept of L-orthogonality has been the focus of research in the past decades, partly due to its connection with the presence of copies of l_1. In recent years this line of research has found connections with research in set theory, through the use of special ultrafilters; mainly Q-points. In this talk we will present the concept of Q-measures, a generalization of Q-points, its connection with the research in L-orthogonality and some consistency and independence results. This is joint work with Antonio Avilés, Gonzalo Martínez Cervantes, and Alejando Poveda.

Further Information
Venue:
ESI Boltzmann Lecture Hall
Recordings:
Recording
Associated Event:
Structures in Banach Spaces (Workshop)
Organizer(s):
Antonio Aviles (U Murcia)
Vera Fischer (U of Vienna)
Grzegorz Plebanek (U of Wroclaw)
Damian Sobota (U of Vienna)