On coherent systems of projections for aleph1 separable groups
Paul C. Eklof, Alan H. Mekler, Saharon Shelah
Abstract
It is proved consistent with either CH or the negation of CH that there is an aleph1-separable group of cardinality aleph1 which does not have a coherent system of projections. It had previously been shown that it is consistent with not CH that every aleph1-separable group of cardinality aleph1 does have a coherent system of projections.
Create a lesson
Related papers
The universal measure of nonstochastic objects
Vladimir Vovk
Hyperarithmetic directions can all be exceptional for Marstrand's projection theorem
Noam Greenberg, Daniel Turetsky
Open Problems in Mathematical Logic
George Barmpalias, Su Gao, Jialiang He et al.
An easy proof that there may be no P-points
David Chodounský, Osvaldo Guzmán, Jonathan Verner
Comments on Choiceless Chain Conditions
Constance Bromham, Asaf Karagila
Localic Esakia Duality via Conic Frames
Nesta van der Schaaf