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math.LO2022
Between Whitehead groups and uniformization
Márk Poór, Saharon Shelah
For a given stationary set of countable ordinals we prove (in ) that the assertion "every -ladder system has -uniformization" is equivalent to "every…
math.LO2022
Universal graphs between a strong limit singular and its power
Márk Poór, Saharon Shelah
The paper settles the problem of the consistency of the existence of a single universal graph between a strong limit singular and its power. Assuming that in a model of $\mathbf{GC…