Algebra Seminar talk
2017-10-06 (15:00)
Asaf Karagila
Spectra of Uniformity
Abstract:
The existence of uniform ultrafilters on infinite sets is predicated
on the axiom of choice. We discuss some related results, and prove an
Easton-like theorem showing the class of cardinals which carry uniform
ultrafilters has very few provable properties without the axiom of choice.
This is a joint work with Yair Hayut, and can be found on https://arxiv.org/abs/1709.04824