Invariant Ideal Axiom

Seminar: 
Topologia
Osoba referująca: 
Michael Hrusak (Universidad Nacional Autónoma de México)
Seminar item date: 
Tuesday, 19. January 2021 - 17:00
Sala: 
zoom.us (contact pborod@math.uni.wroc.pl)
Abstract: 
We shall introduce a consistent set-theoretic axiom IIA which has a profound impact on convergence properties in topological groups. As an application we show that consistently (consequence of IIA) every countable sequential group is either metrizable or $k_\omega$.