Yujun Wei (University of Leeds)
- Date
- Wednesday 13 December 2023, 2.00 PM
- Location
- MALL
- Category
- Models and Sets Seminar
Almost free abelian groups and anti-compactness principles
An abelian group is almost free if any subgroup of smaller cardinality is free. We review some theorems mainly by Magidor and Shelah centered around the question of when almost free abelian groups are free. This also serves as an introduction to some anti-compactness principles such as squares.