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math.LO2018★ 2 cited
Explicit example of collapsing kappa^+ in iteration of kappa-proper forcings
Andrzej Roslanowski
We give an example of iteration of length omega of (<kappa)-complete kappa^+-cc forcing notions with the limit collapsing kappa^+. The construction is decoded from the proof of She…
math.LO2018
Borel sets without perfectly many overlapping translations
Andrzej Roslanowski, Saharon Shelah
For a cardinal lambda<lambda_{omega_1} we give a ccc forcing notion P which forces that for some Borel subset B of the Cantor space (1) there a sequence (eta_alpha:alpha<lambda) of…