I[omega₂] can be the nonstationary ideal on Cof(omega₁)
classification
🧮 math.LO
keywords
omegaconsistentkappanonstationaryanswercardinalcofinalityevery
read the original abstract
We answer a question of Shelah by showing that it is consistent that every set of ordinals of cofinality omega_1 in I[omega_2] is nonstationary if and only if it is consistent that that there is a kappa^+ Mahlo cardinal kappa.
This paper has not been read by Pith yet.
discussion (0)
Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.