Dergiler / Turkish Journal of Mathematics / 2018 / Cilt: 42 - Sayı: 1
A coanalytic Menger group that is not-compact
- Sayfa
- 12–20
- DOI
- —
Abstract
Under V = L we construct coanalytic topological subgroups of reals, demonstrating that even for de nable groups of reals, selection principles may differ.